lkml.org 
[lkml]   [2018]   [Jun]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v6 17/29] fpga: dfl: fme: add partial reconfiguration sub feature support
Hi,

quick question for Alan inline below.

On Tue, Jun 12, 2018 at 06:10:31PM +0800, Wu Hao wrote:
> From: Kang Luwei <luwei.kang@intel.com>
>
> Partial Reconfiguration (PR) is the most important function for FME. It
> allows reconfiguration for given Port/Accelerated Function Unit (AFU).
>
> It creates platform devices for fpga-mgr, fpga-regions and fpga-bridges,
> and invokes fpga-region's interface (fpga_region_program_fpga) for PR
> operation once PR request received via ioctl. Below user space interface
> is exposed by this sub feature.
>
> Ioctl interface:
> * DFL_FPGA_FME_PORT_PR
> Do partial reconfiguration per information from userspace, including
> target port(AFU), buffer size and address info. It returns error code
> to userspace if failed. For detailed PR error information, user needs
> to read fpga-mgr's status sysfs interface.
>
> Signed-off-by: Tim Whisonant <tim.whisonant@intel.com>
> Signed-off-by: Enno Luebbers <enno.luebbers@intel.com>
> Signed-off-by: Shiva Rao <shiva.rao@intel.com>
> Signed-off-by: Christopher Rauer <christopher.rauer@intel.com>
> Signed-off-by: Kang Luwei <luwei.kang@intel.com>
> Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
> Signed-off-by: Wu Hao <hao.wu@intel.com>
> Acked-by: Alan Tull <atull@kernel.org>
> ---
> v2: moved the code to drivers/fpga folder as suggested by Alan Tull.
> switched to GPLv2 license.
> removed status from FPGA_FME_PORT_PR ioctl data structure.
> added platform devices creation for fpga-mgr/fpga-region/fpga-bridge.
> switched to fpga-region interface fpga_region_program_fpga for PR.
> fixed comments from Alan Tull on FPGA_MGR_PARTIAL_RECONFIG flag usage.
> fixed kbuild warnings.
> v3: rename driver files to dfl-fme-*.
> rebase due to fpga APIs change.
> replace bitfields.
> switch to fpga_cdev_find_port to find port device.
> v4: rebase and correct comments for some function.
> fix SPDX license issue.
> remove unnecessary input parameter for destroy_bridge/region function.
> add dfl-fme-pr.h for PR sub feature data structure and registers.
> v5: rebase due to DFL framework API naming changes.
> improve naming for IOCTL API, functions and data structure.
> defer finding port platform device to fme bridge.
> pass mapped ioaddr to fme manager via pdata.
> remove useless devm_kfree().
> v6: rebase, fix copyright time and improve function name.
> add Acked-by from Alan.
> ---
> drivers/fpga/Makefile | 2 +-
> drivers/fpga/dfl-fme-main.c | 43 +++-
> drivers/fpga/dfl-fme-pr.c | 474 ++++++++++++++++++++++++++++++++++++++++++
> drivers/fpga/dfl-fme-pr.h | 84 ++++++++
> drivers/fpga/dfl-fme.h | 38 ++++
> include/uapi/linux/fpga-dfl.h | 28 +++
> 6 files changed, 667 insertions(+), 2 deletions(-)
> create mode 100644 drivers/fpga/dfl-fme-pr.c
> create mode 100644 drivers/fpga/dfl-fme-pr.h
> create mode 100644 drivers/fpga/dfl-fme.h
>
> diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> index db11f34..fd334d40 100644
> --- a/drivers/fpga/Makefile
> +++ b/drivers/fpga/Makefile
> @@ -33,7 +33,7 @@ obj-$(CONFIG_OF_FPGA_REGION) += of-fpga-region.o
> obj-$(CONFIG_FPGA_DFL) += dfl.o
> obj-$(CONFIG_FPGA_DFL_FME) += dfl-fme.o
>
> -dfl-fme-objs := dfl-fme-main.o
> +dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o
>
> # Drivers for FPGAs which implement DFL
> obj-$(CONFIG_FPGA_DFL_PCI) += dfl-pci.o
> diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
> index 889d669..7359804 100644
> --- a/drivers/fpga/dfl-fme-main.c
> +++ b/drivers/fpga/dfl-fme-main.c
> @@ -19,6 +19,7 @@
> #include <linux/fpga-dfl.h>
>
> #include "dfl.h"
> +#include "dfl-fme.h"
>
> static ssize_t ports_num_show(struct device *dev,
> struct device_attribute *attr, char *buf)
> @@ -113,6 +114,10 @@ static void fme_hdr_uinit(struct platform_device *pdev,
> .ops = &fme_hdr_ops,
> },
> {
> + .id = FME_FEATURE_ID_PR_MGMT,
> + .ops = &pr_mgmt_ops,
> + },
> + {
> .ops = NULL,
> },
> };
> @@ -187,6 +192,35 @@ static long fme_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> return -EINVAL;
> }
>
> +static int fme_dev_init(struct platform_device *pdev)
> +{
> + struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + struct dfl_fme *fme;
> +
> + fme = devm_kzalloc(&pdev->dev, sizeof(*fme), GFP_KERNEL);
> + if (!fme)
> + return -ENOMEM;
> +
> + fme->pdata = pdata;
> +
> + mutex_lock(&pdata->lock);
> + dfl_fpga_pdata_set_private(pdata, fme);
> + mutex_unlock(&pdata->lock);
> +
> + return 0;
> +}
> +
> +static void fme_dev_destroy(struct platform_device *pdev)
> +{
> + struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + struct dfl_fme *fme;
> +
> + mutex_lock(&pdata->lock);
> + fme = dfl_fpga_pdata_get_private(pdata);
> + dfl_fpga_pdata_set_private(pdata, NULL);
> + mutex_unlock(&pdata->lock);
> +}
> +
> static const struct file_operations fme_fops = {
> .owner = THIS_MODULE,
> .open = fme_open,
> @@ -198,10 +232,14 @@ static int fme_probe(struct platform_device *pdev)
> {
> int ret;
>
> - ret = dfl_fpga_dev_feature_init(pdev, fme_feature_drvs);
> + ret = fme_dev_init(pdev);
> if (ret)
> goto exit;
>
> + ret = dfl_fpga_dev_feature_init(pdev, fme_feature_drvs);
> + if (ret)
> + goto dev_destroy;
> +
> ret = dfl_fpga_dev_ops_register(pdev, &fme_fops, THIS_MODULE);
> if (ret)
> goto feature_uinit;
> @@ -210,6 +248,8 @@ static int fme_probe(struct platform_device *pdev)
>
> feature_uinit:
> dfl_fpga_dev_feature_uinit(pdev);
> +dev_destroy:
> + fme_dev_destroy(pdev);
> exit:
> return ret;
> }
> @@ -218,6 +258,7 @@ static int fme_remove(struct platform_device *pdev)
> {
> dfl_fpga_dev_ops_unregister(pdev);
> dfl_fpga_dev_feature_uinit(pdev);
> + fme_dev_destroy(pdev);
>
> return 0;
> }
> diff --git a/drivers/fpga/dfl-fme-pr.c b/drivers/fpga/dfl-fme-pr.c
> new file mode 100644
> index 0000000..5939a5c
> --- /dev/null
> +++ b/drivers/fpga/dfl-fme-pr.c
> @@ -0,0 +1,474 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for FPGA Management Engine (FME) Partial Reconfiguration
> + *
> + * Copyright (C) 2017-2018 Intel Corporation, Inc.
> + *
> + * Authors:
> + * Kang Luwei <luwei.kang@intel.com>
> + * Xiao Guangrong <guangrong.xiao@linux.intel.com>
> + * Wu Hao <hao.wu@intel.com>
> + * Joseph Grecco <joe.grecco@intel.com>
> + * Enno Luebbers <enno.luebbers@intel.com>
> + * Tim Whisonant <tim.whisonant@intel.com>
> + * Ananda Ravuri <ananda.ravuri@intel.com>
> + * Christopher Rauer <christopher.rauer@intel.com>
> + * Henry Mitchel <henry.mitchel@intel.com>
> + */
> +
> +#include <linux/types.h>
> +#include <linux/device.h>
> +#include <linux/vmalloc.h>
> +#include <linux/uaccess.h>
> +#include <linux/fpga/fpga-mgr.h>
> +#include <linux/fpga/fpga-bridge.h>
> +#include <linux/fpga/fpga-region.h>
> +#include <linux/fpga-dfl.h>
> +
> +#include "dfl.h"
> +#include "dfl-fme.h"
> +#include "dfl-fme-pr.h"
> +
> +static struct dfl_fme_region *
> +dfl_fme_region_find_by_port_id(struct dfl_fme *fme, int port_id)
> +{
> + struct dfl_fme_region *fme_region;
> +
> + list_for_each_entry(fme_region, &fme->region_list, node)
> + if (fme_region->port_id == port_id)
> + return fme_region;
> +
> + return NULL;
> +}
> +
> +static int dfl_fme_region_match(struct device *dev, const void *data)
> +{
> + return dev->parent == data;
> +}
> +
> +static struct fpga_region *dfl_fme_region_find(struct dfl_fme *fme, int port_id)
> +{
> + struct dfl_fme_region *fme_region;
> + struct fpga_region *region;
> +
> + fme_region = dfl_fme_region_find_by_port_id(fme, port_id);
> + if (!fme_region)
> + return NULL;
> +
> + region = fpga_region_class_find(NULL, &fme_region->region->dev,
> + dfl_fme_region_match);
> + if (!region)
> + return NULL;
> +
> + return region;
> +}
> +
> +static int fme_pr(struct platform_device *pdev, unsigned long arg)
> +{
> + struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + void __user *argp = (void __user *)arg;
> + struct dfl_fpga_fme_port_pr port_pr;
> + struct fpga_image_info *info;
> + struct fpga_region *region;
> + void __iomem *fme_hdr;
> + struct dfl_fme *fme;
> + unsigned long minsz;
> + void *buf = NULL;
> + int ret = 0;
> + u64 v;
> +
> + minsz = offsetofend(struct dfl_fpga_fme_port_pr, buffer_address);
> +
> + 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 = dfl_get_feature_ioaddr_by_id(&pdev->dev,
> + FME_FEATURE_ID_HEADER);
> +
> + /* check port id */
> + v = readq(fme_hdr + FME_HDR_CAP);
> + if (port_pr.port_id >= FIELD_GET(FME_CAP_NUM_PORTS, v)) {
> + dev_dbg(&pdev->dev, "port number more than maximum\n");
> + return -EINVAL;
> + }
> +
> + if (!access_ok(VERIFY_READ,
> + (void __user *)(unsigned long)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 *)(unsigned long)port_pr.buffer_address,
> + port_pr.buffer_size)) {
> + ret = -EFAULT;
> + goto free_exit;
> + }
> +
> + /* prepare fpga_image_info for PR */
> + info = fpga_image_info_alloc(&pdev->dev);
> + if (!info) {
> + ret = -ENOMEM;
> + goto free_exit;
> + }
> +
> + info->flags |= FPGA_MGR_PARTIAL_RECONFIG;
> +
> + mutex_lock(&pdata->lock);
> + fme = dfl_fpga_pdata_get_private(pdata);
> + /* fme device has been unregistered. */
> + if (!fme) {
> + ret = -EINVAL;
> + goto unlock_exit;
> + }
> +
> + region = dfl_fme_region_find(fme, port_pr.port_id);
> + if (!region) {
> + ret = -EINVAL;
> + goto unlock_exit;
> + }
> +
> + fpga_image_info_free(region->info);
> +
> + info->buf = buf;
> + info->count = port_pr.buffer_size;
> + info->region_id = port_pr.port_id;
> + region->info = info;
> +
> + ret = fpga_region_program_fpga(region);
> +
> + if (region->get_bridges)
> + fpga_bridges_put(&region->bridge_list);

I'm wondering if this should not be done as part of
fpga_region_program_fpga() (It's not at the moment).

Alan, am I missing something obvious? :)
> +
> + put_device(&region->dev);
> +unlock_exit:
> + mutex_unlock(&pdata->lock);
> +free_exit:
> + vfree(buf);
> + if (copy_to_user((void __user *)arg, &port_pr, minsz))
> + return -EFAULT;
> +
> + return ret;
> +}
> +
> +/**
> + * dfl_fme_create_mgr - create fpga mgr platform device as child device
> + *
> + * @pdata: fme platform_device's pdata
> + *
> + * Return: mgr platform device if successful, and error code otherwise.
> + */
> +static struct platform_device *
> +dfl_fme_create_mgr(struct dfl_feature_platform_data *pdata,
> + struct dfl_feature *feature)
> +{
> + struct platform_device *mgr, *fme = pdata->dev;
> + struct dfl_fme_mgr_pdata mgr_pdata;
> + int ret = -ENOMEM;
> +
> + if (!feature->ioaddr)
> + return ERR_PTR(-ENODEV);
> +
> + mgr_pdata.ioaddr = feature->ioaddr;
> +
> + /*
> + * Each FME has only one fpga-mgr, so allocate platform device using
> + * the same FME platform device id.
> + */
> + mgr = platform_device_alloc(DFL_FPGA_FME_MGR, fme->id);
> + if (!mgr)
> + return ERR_PTR(ret);
> +
> + mgr->dev.parent = &fme->dev;
> +
> + ret = platform_device_add_data(mgr, &mgr_pdata, sizeof(mgr_pdata));
> + if (ret)
> + goto create_mgr_err;
> +
> + ret = platform_device_add(mgr);
> + if (ret)
> + goto create_mgr_err;
> +
> + return mgr;
> +
> +create_mgr_err:
> + platform_device_put(mgr);
> + return ERR_PTR(ret);
> +}
> +
> +/**
> + * dfl_fme_destroy_mgr - destroy fpga mgr platform device
> + * @pdata: fme platform device's pdata
> + */
> +static void dfl_fme_destroy_mgr(struct dfl_feature_platform_data *pdata)
> +{
> + struct dfl_fme *priv = dfl_fpga_pdata_get_private(pdata);
> +
> + platform_device_unregister(priv->mgr);
> +}
> +
> +/**
> + * dfl_fme_create_bridge - create fme fpga bridge platform device as child
> + *
> + * @pdata: fme platform device's pdata
> + * @port_id: port id for the bridge to be created.
> + *
> + * Return: bridge platform device if successful, and error code otherwise.
> + */
> +static struct dfl_fme_bridge *
> +dfl_fme_create_bridge(struct dfl_feature_platform_data *pdata, int port_id)
> +{
> + struct device *dev = &pdata->dev->dev;
> + struct dfl_fme_br_pdata br_pdata;
> + struct dfl_fme_bridge *fme_br;
> + int ret = -ENOMEM;
> +
> + fme_br = devm_kzalloc(dev, sizeof(*fme_br), GFP_KERNEL);
> + if (!fme_br)
> + return ERR_PTR(ret);
> +
> + br_pdata.cdev = pdata->dfl_cdev;
> + br_pdata.port_id = port_id;
> +
> + fme_br->br = platform_device_alloc(DFL_FPGA_FME_BRIDGE,
> + PLATFORM_DEVID_AUTO);
> + if (!fme_br->br)
> + return ERR_PTR(ret);
> +
> + fme_br->br->dev.parent = dev;
> +
> + ret = platform_device_add_data(fme_br->br, &br_pdata, sizeof(br_pdata));
> + if (ret)
> + goto create_br_err;
> +
> + ret = platform_device_add(fme_br->br);
> + if (ret)
> + goto create_br_err;
> +
> + return fme_br;
> +
> +create_br_err:
> + platform_device_put(fme_br->br);
> + return ERR_PTR(ret);
> +}
> +
> +/**
> + * dfl_fme_destroy_bridge - destroy fpga bridge platform device
> + * @fme_br: fme bridge to destroy
> + */
> +static void dfl_fme_destroy_bridge(struct dfl_fme_bridge *fme_br)
> +{
> + platform_device_unregister(fme_br->br);
> +}
> +
> +/**
> + * dfl_fme_destroy_bridge - destroy all fpga bridge platform device
> + * @pdata: fme platform device's pdata
> + */
> +static void dfl_fme_destroy_bridges(struct dfl_feature_platform_data *pdata)
> +{
> + struct dfl_fme *priv = dfl_fpga_pdata_get_private(pdata);
> + struct dfl_fme_bridge *fbridge, *tmp;
> +
> + list_for_each_entry_safe(fbridge, tmp, &priv->bridge_list, node) {
> + list_del(&fbridge->node);
> + dfl_fme_destroy_bridge(fbridge);
> + }
> +}
> +
> +/**
> + * dfl_fme_create_region - create fpga region platform device as child
> + *
> + * @pdata: fme platform device's pdata
> + * @mgr: mgr platform device needed for region
> + * @br: br platform device needed for region
> + * @port_id: port id
> + *
> + * Return: fme region if successful, and error code otherwise.
> + */
> +static struct dfl_fme_region *
> +dfl_fme_create_region(struct dfl_feature_platform_data *pdata,
> + struct platform_device *mgr,
> + struct platform_device *br, int port_id)
> +{
> + struct dfl_fme_region_pdata region_pdata;
> + struct device *dev = &pdata->dev->dev;
> + struct dfl_fme_region *fme_region;
> + int ret = -ENOMEM;
> +
> + fme_region = devm_kzalloc(dev, sizeof(*fme_region), GFP_KERNEL);
> + if (!fme_region)
> + return ERR_PTR(ret);
> +
> + region_pdata.mgr = mgr;
> + region_pdata.br = br;
> +
> + /*
> + * Each FPGA device may have more than one port, so allocate platform
> + * device using the same port platform device id.
> + */
> + fme_region->region = platform_device_alloc(DFL_FPGA_FME_REGION, br->id);
> + if (!fme_region->region)
> + return ERR_PTR(ret);
> +
> + fme_region->region->dev.parent = dev;
> +
> + ret = platform_device_add_data(fme_region->region, &region_pdata,
> + sizeof(region_pdata));
> + if (ret)
> + goto create_region_err;
> +
> + ret = platform_device_add(fme_region->region);
> + if (ret)
> + goto create_region_err;
> +
> + fme_region->port_id = port_id;
> +
> + return fme_region;
> +
> +create_region_err:
> + platform_device_put(fme_region->region);
> + return ERR_PTR(ret);
> +}
> +
> +/**
> + * dfl_fme_destroy_region - destroy fme region
> + * @fme_region: fme region to destroy
> + */
> +static void dfl_fme_destroy_region(struct dfl_fme_region *fme_region)
> +{
> + platform_device_unregister(fme_region->region);
> +}
> +
> +/**
> + * dfl_fme_destroy_regions - destroy all fme regions
> + * @pdata: fme platform device's pdata
> + */
> +static void dfl_fme_destroy_regions(struct dfl_feature_platform_data *pdata)
> +{
> + struct dfl_fme *priv = dfl_fpga_pdata_get_private(pdata);
> + struct dfl_fme_region *fme_region, *tmp;
> +
> + list_for_each_entry_safe(fme_region, tmp, &priv->region_list, node) {
> + list_del(&fme_region->node);
> + dfl_fme_destroy_region(fme_region);
> + }
> +}
> +
> +static int pr_mgmt_init(struct platform_device *pdev,
> + struct dfl_feature *feature)
> +{
> + struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + struct dfl_fme_region *fme_region;
> + struct dfl_fme_bridge *fme_br;
> + struct platform_device *mgr;
> + struct dfl_fme *priv;
> + void __iomem *fme_hdr;
> + int ret = -ENODEV, i = 0;
> + u64 fme_cap, port_offset;
> +
> + fme_hdr = dfl_get_feature_ioaddr_by_id(&pdev->dev,
> + FME_FEATURE_ID_HEADER);
> +
> + mutex_lock(&pdata->lock);
> + priv = dfl_fpga_pdata_get_private(pdata);
> +
> + /* Initialize the region and bridge sub device list */
> + INIT_LIST_HEAD(&priv->region_list);
> + INIT_LIST_HEAD(&priv->bridge_list);
> +
> + /* Create fpga mgr platform device */
> + mgr = dfl_fme_create_mgr(pdata, feature);
> + if (IS_ERR(mgr)) {
> + dev_err(&pdev->dev, "fail to create fpga mgr pdev\n");
> + goto unlock;
> + }
> +
> + priv->mgr = mgr;
> +
> + /* Read capability register to check number of regions and bridges */
> + fme_cap = readq(fme_hdr + FME_HDR_CAP);
> + for (; i < FIELD_GET(FME_CAP_NUM_PORTS, fme_cap); i++) {
> + port_offset = readq(fme_hdr + FME_HDR_PORT_OFST(i));
> + if (!(port_offset & FME_PORT_OFST_IMP))
> + continue;
> +
> + /* Create bridge for each port */
> + fme_br = dfl_fme_create_bridge(pdata, i);
> + if (IS_ERR(fme_br)) {
> + ret = PTR_ERR(fme_br);
> + goto destroy_region;
> + }
> +
> + list_add(&fme_br->node, &priv->bridge_list);
> +
> + /* Create region for each port */
> + fme_region = dfl_fme_create_region(pdata, mgr,
> + fme_br->br, i);
> + if (!fme_region) {
> + ret = PTR_ERR(fme_region);
> + goto destroy_region;
> + }
> +
> + list_add(&fme_region->node, &priv->region_list);
> + }
> + mutex_unlock(&pdata->lock);
> +
> + return 0;
> +
> +destroy_region:
> + dfl_fme_destroy_regions(pdata);
> + dfl_fme_destroy_bridges(pdata);
> + dfl_fme_destroy_mgr(pdata);
> +unlock:
> + mutex_unlock(&pdata->lock);
> + return ret;
> +}
> +
> +static void pr_mgmt_uinit(struct platform_device *pdev,
> + struct dfl_feature *feature)
> +{
> + struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> + struct dfl_fme *priv;
> +
> + mutex_lock(&pdata->lock);
> + priv = dfl_fpga_pdata_get_private(pdata);
> +
> + dfl_fme_destroy_regions(pdata);
> + dfl_fme_destroy_bridges(pdata);
> + dfl_fme_destroy_mgr(pdata);
> + mutex_unlock(&pdata->lock);
> +}
> +
> +static long fme_pr_ioctl(struct platform_device *pdev,
> + struct dfl_feature *feature,
> + unsigned int cmd, unsigned long arg)
> +{
> + long ret;
> +
> + switch (cmd) {
> + case DFL_FPGA_FME_PORT_PR:
> + ret = fme_pr(pdev, arg);
> + break;
> + default:
> + ret = -ENODEV;
> + }
> +
> + return ret;
> +}
> +
> +const struct dfl_feature_ops pr_mgmt_ops = {
> + .init = pr_mgmt_init,
> + .uinit = pr_mgmt_uinit,
> + .ioctl = fme_pr_ioctl,
> +};
> diff --git a/drivers/fpga/dfl-fme-pr.h b/drivers/fpga/dfl-fme-pr.h
> new file mode 100644
> index 0000000..096a699
> --- /dev/null
> +++ b/drivers/fpga/dfl-fme-pr.h
> @@ -0,0 +1,84 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Header file for FPGA Management Engine (FME) Partial Reconfiguration Driver
> + *
> + * Copyright (C) 2017-2018 Intel Corporation, Inc.
> + *
> + * Authors:
> + * Kang Luwei <luwei.kang@intel.com>
> + * Xiao Guangrong <guangrong.xiao@linux.intel.com>
> + * Wu Hao <hao.wu@intel.com>
> + * Joseph Grecco <joe.grecco@intel.com>
> + * Enno Luebbers <enno.luebbers@intel.com>
> + * Tim Whisonant <tim.whisonant@intel.com>
> + * Ananda Ravuri <ananda.ravuri@intel.com>
> + * Henry Mitchel <henry.mitchel@intel.com>
> + */
> +
> +#ifndef __DFL_FME_PR_H
> +#define __DFL_FME_PR_H
> +
> +#include <linux/platform_device.h>
> +
> +/**
> + * struct dfl_fme_region - FME fpga region data structure
> + *
> + * @region: platform device of the FPGA region.
> + * @node: used to link fme_region to a list.
> + * @port_id: indicate which port this region connected to.
> + */
> +struct dfl_fme_region {
> + struct platform_device *region;
> + struct list_head node;
> + int port_id;
> +};
> +
> +/**
> + * struct dfl_fme_region_pdata - platform data for FME region platform device.
> + *
> + * @mgr: platform device of the FPGA manager.
> + * @br: platform device of the FPGA bridge.
> + * @region_id: region id (same as port_id).
> + */
> +struct dfl_fme_region_pdata {
> + struct platform_device *mgr;
> + struct platform_device *br;
> + int region_id;
> +};
> +
> +/**
> + * struct dfl_fme_bridge - FME fpga bridge data structure
> + *
> + * @br: platform device of the FPGA bridge.
> + * @node: used to link fme_bridge to a list.
> + */
> +struct dfl_fme_bridge {
> + struct platform_device *br;
> + struct list_head node;
> +};
> +
> +/**
> + * struct dfl_fme_bridge_pdata - platform data for FME bridge platform device.
> + *
> + * @cdev: container device.
> + * @port_id: port id.
> + */
> +struct dfl_fme_br_pdata {
> + struct dfl_fpga_cdev *cdev;
> + int port_id;
> +};
> +
> +/**
> + * struct dfl_fme_mgr_pdata - platform data for FME manager platform device.
> + *
> + * @ioaddr: mapped io address for FME manager platform device.
> + */
> +struct dfl_fme_mgr_pdata {
> + void __iomem *ioaddr;
> +};
> +
> +#define DFL_FPGA_FME_MGR "dfl-fme-mgr"
> +#define DFL_FPGA_FME_BRIDGE "dfl-fme-bridge"
> +#define DFL_FPGA_FME_REGION "dfl-fme-region"
> +
> +#endif /* __DFL_FME_PR_H */
> diff --git a/drivers/fpga/dfl-fme.h b/drivers/fpga/dfl-fme.h
> new file mode 100644
> index 0000000..ac6d61a
> --- /dev/null
> +++ b/drivers/fpga/dfl-fme.h
> @@ -0,0 +1,38 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Header file for FPGA Management Engine (FME) Driver
> + *
> + * Copyright (C) 2017-2018 Intel Corporation, Inc.
> + *
> + * Authors:
> + * Kang Luwei <luwei.kang@intel.com>
> + * Xiao Guangrong <guangrong.xiao@linux.intel.com>
> + * Wu Hao <hao.wu@intel.com>
> + * Joseph Grecco <joe.grecco@intel.com>
> + * Enno Luebbers <enno.luebbers@intel.com>
> + * Tim Whisonant <tim.whisonant@intel.com>
> + * Ananda Ravuri <ananda.ravuri@intel.com>
> + * Henry Mitchel <henry.mitchel@intel.com>
> + */
> +
> +#ifndef __DFL_FME_H
> +#define __DFL_FME_H
> +
> +/**
> + * struct dfl_fme - dfl fme private data
> + *
> + * @mgr: FME's FPGA manager platform device.
> + * @region_list: link list of FME's FPGA regions.
> + * @bridge_list: link list of FME's FPGA bridges.
> + * @pdata: fme platform device's pdata.
> + */
> +struct dfl_fme {
> + struct platform_device *mgr;
> + struct list_head region_list;
> + struct list_head bridge_list;
> + struct dfl_feature_platform_data *pdata;
> +};
> +
> +extern const struct dfl_feature_ops pr_mgmt_ops;
> +
> +#endif /* __DFL_FME_H */
> diff --git a/include/uapi/linux/fpga-dfl.h b/include/uapi/linux/fpga-dfl.h
> index 9ff26cb..9abfc1d 100644
> --- a/include/uapi/linux/fpga-dfl.h
> +++ b/include/uapi/linux/fpga-dfl.h
> @@ -14,6 +14,8 @@
> #ifndef _UAPI_LINUX_FPGA_DFL_H
> #define _UAPI_LINUX_FPGA_DFL_H
>
> +#include <linux/types.h>
> +
> #define DFL_FPGA_API_VERSION 0
>
> /*
> @@ -26,6 +28,7 @@
> #define DFL_FPGA_MAGIC 0xB6
>
> #define DFL_FPGA_BASE 0
> +#define DFL_FME_BASE 0x80
>
> /**
> * DFL_FPGA_GET_API_VERSION - _IO(DFL_FPGA_MAGIC, DFL_FPGA_BASE + 0)
> @@ -45,4 +48,29 @@
>
> #define DFL_FPGA_CHECK_EXTENSION _IO(DFL_FPGA_MAGIC, DFL_FPGA_BASE + 1)
>
> +/* IOCTLs for FME file descriptor */
> +
> +/**
> + * DFL_FPGA_FME_PORT_PR - _IOW(DFL_FPGA_MAGIC, DFL_FME_BASE + 0,
> + * struct dfl_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 DFL_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 info
> + * from the status of FME's fpga manager.
> + */
> +
> +struct dfl_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 */
> +};
> +
> +#define DFL_FPGA_FME_PORT_PR _IO(DFL_FPGA_MAGIC, DFL_FME_BASE + 0)
> +
> #endif /* _UAPI_LINUX_FPGA_DFL_H */
> --
> 1.8.3.1
>

Thanks,

Moritz

\
 
 \ /
  Last update: 2018-06-14 03:07    [W:0.199 / U:26.152 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site