This patch adds FPGA Manager support for the Xilinx
ZynqMp chip.
Signed-off-by: Nava kishore Manne <nava.manne@xxxxxxxxxx>
---
drivers/fpga/Kconfig | 6 ++
drivers/fpga/Makefile | 1 +
drivers/fpga/zynqmp-fpga.c | 164 +++++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+)
create mode 100644 drivers/fpga/zynqmp-fpga.c
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index cd84934774cc..b84e3555b3e3 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -26,6 +26,12 @@ config FPGA_MGR_ZYNQ_FPGA
help
FPGA manager driver support for Xilinx Zynq FPGAs.
+config FPGA_MGR_ZYNQMP_FPGA
+ tristate "Xilinx Zynqmp FPGA"
+ depends on ARCH_ZYNQMP || COMPILE_TEST
+ help
+ FPGA manager driver support for Xilinx ZynqMp FPGAs.
+
endif # FPGA
endmenu
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 8d83fc6b1613..ef444512cb01 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_FPGA) += fpga-mgr.o
# FPGA Manager Drivers
obj-$(CONFIG_FPGA_MGR_SOCFPGA) += socfpga.o
obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA) += zynq-fpga.o
+obj-$(CONFIG_FPGA_MGR_ZYNQMP_FPGA) += zynqmp-fpga.o
diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c
new file mode 100644
index 000000000000..e4172c3a6868
--- /dev/null
+++ b/drivers/fpga/zynqmp-fpga.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Xilinx, Inc.
+ *
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/fpga/fpga-mgr.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/string.h>
+#include <linux/firmware/xilinx/zynqmp/firmware.h>
+
+/* Constant Definitions */
+#define IXR_FPGA_DONE_MASK 0X00000008U
+#define IXR_FPGA_ENCRYPTION_EN 0x00000008U
+
+/**
+ * struct zynqmp_fpga_priv - Private data structure
+ * @dev: Device data structure
+ * @flags: flags which is used to identify the bitfile type
+ */
+struct zynqmp_fpga_priv {
+ struct device *dev;
+ u32 flags;
+};
+
+static int zynqmp_fpga_ops_write_init(struct fpga_manager *mgr,
+ struct fpga_image_info *info,
+ const char *buf, size_t size)
+{
+ struct zynqmp_fpga_priv *priv;
+
+ priv = mgr->priv;
+ priv->flags = info->flags;
+
+ return 0;
+}
+
+static int zynqmp_fpga_ops_write(struct fpga_manager *mgr,
+ const char *buf, size_t size)
+{
+ struct zynqmp_fpga_priv *priv;
+ char *kbuf;
+ size_t dma_size;
+ dma_addr_t dma_addr;
+ int ret;
+ const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->fpga_load)
+ return -ENXIO;
+
+ priv = mgr->priv;
+
+ if (mgr->flags & IXR_FPGA_ENCRYPTION_EN)
+ dma_size = size + ENCRYPTED_KEY_LEN;
+ else
+ dma_size = size;
+
+ kbuf = dma_alloc_coherent(priv->dev, dma_size, &dma_addr, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ memcpy(kbuf, buf, size);
+
+ if (mgr->flags & IXR_FPGA_ENCRYPTION_EN)
+ memcpy(kbuf + size, mgr->key, ENCRYPTED_KEY_LEN);
+
+ wmb(); /* ensure all writes are done before initiate FW call */
+
+ if (mgr->flags & IXR_FPGA_ENCRYPTION_EN)
+ ret = eemi_ops->fpga_load(dma_addr, dma_addr + size,
+ mgr->flags);
+ else
+ ret = eemi_ops->fpga_load(dma_addr, size, mgr->flags);
+
+ dma_free_coherent(priv->dev, dma_size, kbuf, dma_addr);
+
+ return ret;
+}
+
+static int zynqmp_fpga_ops_write_complete(struct fpga_manager *mgr,
+ struct fpga_image_info *info)
+{
+ return 0;
+}
+
+static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
+{
+ u32 status;
+ const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->fpga_get_status)
+ return FPGA_MGR_STATE_UNKNOWN;
+
+ eemi_ops->fpga_get_status(&status);
+ if (status & IXR_FPGA_DONE_MASK)
+ return FPGA_MGR_STATE_OPERATING;
+
+ return FPGA_MGR_STATE_UNKNOWN;
+}
+
+static const struct fpga_manager_ops zynqmp_fpga_ops = {
+ .state = zynqmp_fpga_ops_state,
+ .write_init = zynqmp_fpga_ops_write_init,
+ .write = zynqmp_fpga_ops_write,
+ .write_complete = zynqmp_fpga_ops_write_complete,
+};
+
+static int zynqmp_fpga_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct zynqmp_fpga_priv *priv;
+ int err, ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(44));
+ if (ret < 0)
+ dev_err(dev, "no usable DMA configuration");
+
+ err = fpga_mgr_register(dev, "Xilinx ZynqMP FPGA Manager",
+ &zynqmp_fpga_ops, priv);
+ if (err) {
+ dev_err(dev, "unable to register FPGA manager");
+ return err;
+ }
+
+ return 0;
+}
+
+static int zynqmp_fpga_remove(struct platform_device *pdev)
+{
+ fpga_mgr_unregister(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id zynqmp_fpga_of_match[] = {
+ { .compatible = "xlnx,zynqmp-pcap-fpga", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, zynqmp_fpga_of_match);
+
+static struct platform_driver zynqmp_fpga_driver = {
+ .probe = zynqmp_fpga_probe,
+ .remove = zynqmp_fpga_remove,
+ .driver = {
+ .name = "zynqmp_fpga_manager",
+ .of_match_table = of_match_ptr(zynqmp_fpga_of_match),
+ },
+};
+
+module_platform_driver(zynqmp_fpga_driver);
+
+MODULE_AUTHOR("Nava kishore Manne <navam@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Xilinx ZynqMp FPGA Manager");
+MODULE_LICENSE("GPL");
--
2.18.0
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