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The FPGA manager class driver data structure is being treated as a managed resource instead of using the standard dev_release call-back function to release the class data structure. This change removes the managed resource code for the freeing of the class data structure and combines the create() and register() functions into a single register() or register_full() function. The register_full() function accepts an info data structure to provide flexibility in passing optional parameters. The register() function supports the current parameter list for users that don't require the use of optional parameters. The devm_fpga_mgr_register() function is retained, and the devm_fpga_mgr_register_full() function is added. Signed-off-by: Russ Weight <russell.h.weight@intel.com> Reviewed-by: Xu Yilun <yilun.xu@intel.com> Acked-by: Xu Yilun <yilun.xu@intel.com> Signed-off-by: Moritz Fischer <mdf@kernel.org>
124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Xilinx, Inc.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/fpga/fpga-mgr.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/string.h>
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#include <linux/firmware/xlnx-zynqmp.h>
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/* Constant Definitions */
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#define IXR_FPGA_DONE_MASK BIT(3)
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/**
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* struct zynqmp_fpga_priv - Private data structure
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* @dev: Device data structure
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* @flags: flags which is used to identify the bitfile type
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*/
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struct zynqmp_fpga_priv {
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struct device *dev;
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u32 flags;
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};
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static int zynqmp_fpga_ops_write_init(struct fpga_manager *mgr,
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struct fpga_image_info *info,
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const char *buf, size_t size)
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{
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struct zynqmp_fpga_priv *priv;
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priv = mgr->priv;
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priv->flags = info->flags;
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return 0;
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}
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static int zynqmp_fpga_ops_write(struct fpga_manager *mgr,
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const char *buf, size_t size)
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{
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struct zynqmp_fpga_priv *priv;
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dma_addr_t dma_addr;
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u32 eemi_flags = 0;
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char *kbuf;
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int ret;
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priv = mgr->priv;
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kbuf = dma_alloc_coherent(priv->dev, size, &dma_addr, GFP_KERNEL);
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if (!kbuf)
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return -ENOMEM;
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memcpy(kbuf, buf, size);
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wmb(); /* ensure all writes are done before initiate FW call */
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if (priv->flags & FPGA_MGR_PARTIAL_RECONFIG)
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eemi_flags |= XILINX_ZYNQMP_PM_FPGA_PARTIAL;
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ret = zynqmp_pm_fpga_load(dma_addr, size, eemi_flags);
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dma_free_coherent(priv->dev, size, kbuf, dma_addr);
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return ret;
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}
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static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
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{
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u32 status = 0;
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zynqmp_pm_fpga_get_status(&status);
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if (status & IXR_FPGA_DONE_MASK)
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return FPGA_MGR_STATE_OPERATING;
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return FPGA_MGR_STATE_UNKNOWN;
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}
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static const struct fpga_manager_ops zynqmp_fpga_ops = {
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.state = zynqmp_fpga_ops_state,
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.write_init = zynqmp_fpga_ops_write_init,
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.write = zynqmp_fpga_ops_write,
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};
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static int zynqmp_fpga_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct zynqmp_fpga_priv *priv;
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struct fpga_manager *mgr;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->dev = dev;
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mgr = devm_fpga_mgr_register(dev, "Xilinx ZynqMP FPGA Manager",
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&zynqmp_fpga_ops, priv);
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return PTR_ERR_OR_ZERO(mgr);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id zynqmp_fpga_of_match[] = {
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{ .compatible = "xlnx,zynqmp-pcap-fpga", },
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{},
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};
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MODULE_DEVICE_TABLE(of, zynqmp_fpga_of_match);
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#endif
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static struct platform_driver zynqmp_fpga_driver = {
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.probe = zynqmp_fpga_probe,
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.driver = {
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.name = "zynqmp_fpga_manager",
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.of_match_table = of_match_ptr(zynqmp_fpga_of_match),
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},
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};
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module_platform_driver(zynqmp_fpga_driver);
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MODULE_AUTHOR("Nava kishore Manne <navam@xilinx.com>");
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MODULE_DESCRIPTION("Xilinx ZynqMp FPGA Manager");
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MODULE_LICENSE("GPL");
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