forked from Minki/linux
084181fe8c
Add devm_fpga_mgr_create() which is the managed version of fpga_mgr_create(). Change current FPGA manager drivers to use devm_fpga_mgr_create() Signed-off-by: Alan Tull <atull@kernel.org> Suggested-by: Federico Vaga <federico.vaga@cern.ch> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
345 lines
9.2 KiB
C
345 lines
9.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* FPGA Manager Driver for FPGA Management Engine (FME)
|
|
*
|
|
* 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/bitfield.h>
|
|
#include <linux/module.h>
|
|
#include <linux/iopoll.h>
|
|
#include <linux/io-64-nonatomic-lo-hi.h>
|
|
#include <linux/fpga/fpga-mgr.h>
|
|
|
|
#include "dfl-fme-pr.h"
|
|
|
|
/* FME Partial Reconfiguration Sub Feature Register Set */
|
|
#define FME_PR_DFH 0x0
|
|
#define FME_PR_CTRL 0x8
|
|
#define FME_PR_STS 0x10
|
|
#define FME_PR_DATA 0x18
|
|
#define FME_PR_ERR 0x20
|
|
#define FME_PR_INTFC_ID_H 0xA8
|
|
#define FME_PR_INTFC_ID_L 0xB0
|
|
|
|
/* FME PR Control Register Bitfield */
|
|
#define FME_PR_CTRL_PR_RST BIT_ULL(0) /* Reset PR engine */
|
|
#define FME_PR_CTRL_PR_RSTACK BIT_ULL(4) /* Ack for PR engine reset */
|
|
#define FME_PR_CTRL_PR_RGN_ID GENMASK_ULL(9, 7) /* PR Region ID */
|
|
#define FME_PR_CTRL_PR_START BIT_ULL(12) /* Start to request PR service */
|
|
#define FME_PR_CTRL_PR_COMPLETE BIT_ULL(13) /* PR data push completion */
|
|
|
|
/* FME PR Status Register Bitfield */
|
|
/* Number of available entries in HW queue inside the PR engine. */
|
|
#define FME_PR_STS_PR_CREDIT GENMASK_ULL(8, 0)
|
|
#define FME_PR_STS_PR_STS BIT_ULL(16) /* PR operation status */
|
|
#define FME_PR_STS_PR_STS_IDLE 0
|
|
#define FME_PR_STS_PR_CTRLR_STS GENMASK_ULL(22, 20) /* Controller status */
|
|
#define FME_PR_STS_PR_HOST_STS GENMASK_ULL(27, 24) /* PR host status */
|
|
|
|
/* FME PR Data Register Bitfield */
|
|
/* PR data from the raw-binary file. */
|
|
#define FME_PR_DATA_PR_DATA_RAW GENMASK_ULL(32, 0)
|
|
|
|
/* FME PR Error Register */
|
|
/* PR Operation errors detected. */
|
|
#define FME_PR_ERR_OPERATION_ERR BIT_ULL(0)
|
|
/* CRC error detected. */
|
|
#define FME_PR_ERR_CRC_ERR BIT_ULL(1)
|
|
/* Incompatible PR bitstream detected. */
|
|
#define FME_PR_ERR_INCOMPATIBLE_BS BIT_ULL(2)
|
|
/* PR data push protocol violated. */
|
|
#define FME_PR_ERR_PROTOCOL_ERR BIT_ULL(3)
|
|
/* PR data fifo overflow error detected */
|
|
#define FME_PR_ERR_FIFO_OVERFLOW BIT_ULL(4)
|
|
|
|
#define PR_WAIT_TIMEOUT 8000000
|
|
#define PR_HOST_STATUS_IDLE 0
|
|
|
|
struct fme_mgr_priv {
|
|
void __iomem *ioaddr;
|
|
u64 pr_error;
|
|
};
|
|
|
|
static u64 pr_error_to_mgr_status(u64 err)
|
|
{
|
|
u64 status = 0;
|
|
|
|
if (err & FME_PR_ERR_OPERATION_ERR)
|
|
status |= FPGA_MGR_STATUS_OPERATION_ERR;
|
|
if (err & FME_PR_ERR_CRC_ERR)
|
|
status |= FPGA_MGR_STATUS_CRC_ERR;
|
|
if (err & FME_PR_ERR_INCOMPATIBLE_BS)
|
|
status |= FPGA_MGR_STATUS_INCOMPATIBLE_IMAGE_ERR;
|
|
if (err & FME_PR_ERR_PROTOCOL_ERR)
|
|
status |= FPGA_MGR_STATUS_IP_PROTOCOL_ERR;
|
|
if (err & FME_PR_ERR_FIFO_OVERFLOW)
|
|
status |= FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR;
|
|
|
|
return status;
|
|
}
|
|
|
|
static u64 fme_mgr_pr_error_handle(void __iomem *fme_pr)
|
|
{
|
|
u64 pr_status, pr_error;
|
|
|
|
pr_status = readq(fme_pr + FME_PR_STS);
|
|
if (!(pr_status & FME_PR_STS_PR_STS))
|
|
return 0;
|
|
|
|
pr_error = readq(fme_pr + FME_PR_ERR);
|
|
writeq(pr_error, fme_pr + FME_PR_ERR);
|
|
|
|
return pr_error;
|
|
}
|
|
|
|
static int fme_mgr_write_init(struct fpga_manager *mgr,
|
|
struct fpga_image_info *info,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct device *dev = &mgr->dev;
|
|
struct fme_mgr_priv *priv = mgr->priv;
|
|
void __iomem *fme_pr = priv->ioaddr;
|
|
u64 pr_ctrl, pr_status;
|
|
|
|
if (!(info->flags & FPGA_MGR_PARTIAL_RECONFIG)) {
|
|
dev_err(dev, "only supports partial reconfiguration.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev_dbg(dev, "resetting PR before initiated PR\n");
|
|
|
|
pr_ctrl = readq(fme_pr + FME_PR_CTRL);
|
|
pr_ctrl |= FME_PR_CTRL_PR_RST;
|
|
writeq(pr_ctrl, fme_pr + FME_PR_CTRL);
|
|
|
|
if (readq_poll_timeout(fme_pr + FME_PR_CTRL, pr_ctrl,
|
|
pr_ctrl & FME_PR_CTRL_PR_RSTACK, 1,
|
|
PR_WAIT_TIMEOUT)) {
|
|
dev_err(dev, "PR Reset ACK timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
pr_ctrl = readq(fme_pr + FME_PR_CTRL);
|
|
pr_ctrl &= ~FME_PR_CTRL_PR_RST;
|
|
writeq(pr_ctrl, fme_pr + FME_PR_CTRL);
|
|
|
|
dev_dbg(dev,
|
|
"waiting for PR resource in HW to be initialized and ready\n");
|
|
|
|
if (readq_poll_timeout(fme_pr + FME_PR_STS, pr_status,
|
|
(pr_status & FME_PR_STS_PR_STS) ==
|
|
FME_PR_STS_PR_STS_IDLE, 1, PR_WAIT_TIMEOUT)) {
|
|
dev_err(dev, "PR Status timeout\n");
|
|
priv->pr_error = fme_mgr_pr_error_handle(fme_pr);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
dev_dbg(dev, "check and clear previous PR error\n");
|
|
priv->pr_error = fme_mgr_pr_error_handle(fme_pr);
|
|
if (priv->pr_error)
|
|
dev_dbg(dev, "previous PR error detected %llx\n",
|
|
(unsigned long long)priv->pr_error);
|
|
|
|
dev_dbg(dev, "set PR port ID\n");
|
|
|
|
pr_ctrl = readq(fme_pr + FME_PR_CTRL);
|
|
pr_ctrl &= ~FME_PR_CTRL_PR_RGN_ID;
|
|
pr_ctrl |= FIELD_PREP(FME_PR_CTRL_PR_RGN_ID, info->region_id);
|
|
writeq(pr_ctrl, fme_pr + FME_PR_CTRL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fme_mgr_write(struct fpga_manager *mgr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct device *dev = &mgr->dev;
|
|
struct fme_mgr_priv *priv = mgr->priv;
|
|
void __iomem *fme_pr = priv->ioaddr;
|
|
u64 pr_ctrl, pr_status, pr_data;
|
|
int delay = 0, pr_credit, i = 0;
|
|
|
|
dev_dbg(dev, "start request\n");
|
|
|
|
pr_ctrl = readq(fme_pr + FME_PR_CTRL);
|
|
pr_ctrl |= FME_PR_CTRL_PR_START;
|
|
writeq(pr_ctrl, fme_pr + FME_PR_CTRL);
|
|
|
|
dev_dbg(dev, "pushing data from bitstream to HW\n");
|
|
|
|
/*
|
|
* driver can push data to PR hardware using PR_DATA register once HW
|
|
* has enough pr_credit (> 1), pr_credit reduces one for every 32bit
|
|
* pr data write to PR_DATA register. If pr_credit <= 1, driver needs
|
|
* to wait for enough pr_credit from hardware by polling.
|
|
*/
|
|
pr_status = readq(fme_pr + FME_PR_STS);
|
|
pr_credit = FIELD_GET(FME_PR_STS_PR_CREDIT, pr_status);
|
|
|
|
while (count > 0) {
|
|
while (pr_credit <= 1) {
|
|
if (delay++ > PR_WAIT_TIMEOUT) {
|
|
dev_err(dev, "PR_CREDIT timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
udelay(1);
|
|
|
|
pr_status = readq(fme_pr + FME_PR_STS);
|
|
pr_credit = FIELD_GET(FME_PR_STS_PR_CREDIT, pr_status);
|
|
}
|
|
|
|
if (count < 4) {
|
|
dev_err(dev, "Invalid PR bitstream size\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pr_data = 0;
|
|
pr_data |= FIELD_PREP(FME_PR_DATA_PR_DATA_RAW,
|
|
*(((u32 *)buf) + i));
|
|
writeq(pr_data, fme_pr + FME_PR_DATA);
|
|
count -= 4;
|
|
pr_credit--;
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fme_mgr_write_complete(struct fpga_manager *mgr,
|
|
struct fpga_image_info *info)
|
|
{
|
|
struct device *dev = &mgr->dev;
|
|
struct fme_mgr_priv *priv = mgr->priv;
|
|
void __iomem *fme_pr = priv->ioaddr;
|
|
u64 pr_ctrl;
|
|
|
|
pr_ctrl = readq(fme_pr + FME_PR_CTRL);
|
|
pr_ctrl |= FME_PR_CTRL_PR_COMPLETE;
|
|
writeq(pr_ctrl, fme_pr + FME_PR_CTRL);
|
|
|
|
dev_dbg(dev, "green bitstream push complete\n");
|
|
dev_dbg(dev, "waiting for HW to release PR resource\n");
|
|
|
|
if (readq_poll_timeout(fme_pr + FME_PR_CTRL, pr_ctrl,
|
|
!(pr_ctrl & FME_PR_CTRL_PR_START), 1,
|
|
PR_WAIT_TIMEOUT)) {
|
|
dev_err(dev, "PR Completion ACK timeout.\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
dev_dbg(dev, "PR operation complete, checking status\n");
|
|
priv->pr_error = fme_mgr_pr_error_handle(fme_pr);
|
|
if (priv->pr_error) {
|
|
dev_dbg(dev, "PR error detected %llx\n",
|
|
(unsigned long long)priv->pr_error);
|
|
return -EIO;
|
|
}
|
|
|
|
dev_dbg(dev, "PR done successfully\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum fpga_mgr_states fme_mgr_state(struct fpga_manager *mgr)
|
|
{
|
|
return FPGA_MGR_STATE_UNKNOWN;
|
|
}
|
|
|
|
static u64 fme_mgr_status(struct fpga_manager *mgr)
|
|
{
|
|
struct fme_mgr_priv *priv = mgr->priv;
|
|
|
|
return pr_error_to_mgr_status(priv->pr_error);
|
|
}
|
|
|
|
static const struct fpga_manager_ops fme_mgr_ops = {
|
|
.write_init = fme_mgr_write_init,
|
|
.write = fme_mgr_write,
|
|
.write_complete = fme_mgr_write_complete,
|
|
.state = fme_mgr_state,
|
|
.status = fme_mgr_status,
|
|
};
|
|
|
|
static void fme_mgr_get_compat_id(void __iomem *fme_pr,
|
|
struct fpga_compat_id *id)
|
|
{
|
|
id->id_l = readq(fme_pr + FME_PR_INTFC_ID_L);
|
|
id->id_h = readq(fme_pr + FME_PR_INTFC_ID_H);
|
|
}
|
|
|
|
static int fme_mgr_probe(struct platform_device *pdev)
|
|
{
|
|
struct dfl_fme_mgr_pdata *pdata = dev_get_platdata(&pdev->dev);
|
|
struct fpga_compat_id *compat_id;
|
|
struct device *dev = &pdev->dev;
|
|
struct fme_mgr_priv *priv;
|
|
struct fpga_manager *mgr;
|
|
struct resource *res;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
if (pdata->ioaddr)
|
|
priv->ioaddr = pdata->ioaddr;
|
|
|
|
if (!priv->ioaddr) {
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
priv->ioaddr = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(priv->ioaddr))
|
|
return PTR_ERR(priv->ioaddr);
|
|
}
|
|
|
|
compat_id = devm_kzalloc(dev, sizeof(*compat_id), GFP_KERNEL);
|
|
if (!compat_id)
|
|
return -ENOMEM;
|
|
|
|
fme_mgr_get_compat_id(priv->ioaddr, compat_id);
|
|
|
|
mgr = devm_fpga_mgr_create(dev, "DFL FME FPGA Manager",
|
|
&fme_mgr_ops, priv);
|
|
if (!mgr)
|
|
return -ENOMEM;
|
|
|
|
mgr->compat_id = compat_id;
|
|
platform_set_drvdata(pdev, mgr);
|
|
|
|
return fpga_mgr_register(mgr);
|
|
}
|
|
|
|
static int fme_mgr_remove(struct platform_device *pdev)
|
|
{
|
|
struct fpga_manager *mgr = platform_get_drvdata(pdev);
|
|
|
|
fpga_mgr_unregister(mgr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver fme_mgr_driver = {
|
|
.driver = {
|
|
.name = DFL_FPGA_FME_MGR,
|
|
},
|
|
.probe = fme_mgr_probe,
|
|
.remove = fme_mgr_remove,
|
|
};
|
|
|
|
module_platform_driver(fme_mgr_driver);
|
|
|
|
MODULE_DESCRIPTION("FPGA Manager for DFL FPGA Management Engine");
|
|
MODULE_AUTHOR("Intel Corporation");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:dfl-fme-mgr");
|