Merge tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc drivers updates from Greg KH:
 "Here is the "big" set of char/misc and other driver subsystems for
  6.4-rc1.

  It's pretty big, but due to the removal of pcmcia drivers, almost
  breaks even for number of lines added vs. removed, a nice change.

  Included in here are:

   - removal of unused PCMCIA drivers (finally!)

   - Interconnect driver updates and additions

   - Lots of IIO driver updates and additions

   - MHI driver updates

   - Coresight driver updates

   - NVMEM driver updates, which required some OF updates

   - W1 driver updates and a new maintainer to manage the subsystem

   - FPGA driver updates

   - New driver subsystem, CDX, for AMD systems

   - lots of other small driver updates and additions

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (196 commits)
  mcb-lpc: Reallocate memory region to avoid memory overlapping
  mcb-pci: Reallocate memory region to avoid memory overlapping
  mcb: Return actual parsed size when reading chameleon table
  kernel/configs: Drop Android config fragments
  virt: acrn: Replace obsolete memalign() with posix_memalign()
  spmi: Add a check for remove callback when removing a SPMI driver
  spmi: fix W=1 kernel-doc warnings
  spmi: mtk-pmif: Drop of_match_ptr for ID table
  spmi: pmic-arb: Convert to platform remove callback returning void
  spmi: mtk-pmif: Convert to platform remove callback returning void
  spmi: hisi-spmi-controller: Convert to platform remove callback returning void
  w1: gpio: remove unnecessary ENOMEM messages
  w1: omap-hdq: remove unnecessary ENOMEM messages
  w1: omap-hdq: add SPDX tag
  w1: omap-hdq: allow compile testing
  w1: matrox: remove unnecessary ENOMEM messages
  w1: matrox: use inline over __inline__
  w1: matrox: switch from asm to linux header
  w1: ds2482: do not use assignment in if condition
  w1: ds2482: drop unnecessary header
  ...

1 files changed, 230 insertions, 0 deletions

diff --git a/drivers/cdx/controller/cdx_controller.c b/drivers/cdx/controller/cdx_controller.c
new file mode 100644
index 000000000000..dc52f95f8978
--- /dev/null
+++ b/drivers/cdx/controller/cdx_controller.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CDX host controller driver for AMD versal-net platform.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/cdx/cdx_bus.h>
+
+#include "cdx_controller.h"
+#include "../cdx.h"
+#include "mcdi_functions.h"
+#include "mcdi.h"
+
+static unsigned int cdx_mcdi_rpc_timeout(struct cdx_mcdi *cdx, unsigned int cmd)
+{
+	return MCDI_RPC_TIMEOUT;
+}
+
+static void cdx_mcdi_request(struct cdx_mcdi *cdx,
+			     const struct cdx_dword *hdr, size_t hdr_len,
+			     const struct cdx_dword *sdu, size_t sdu_len)
+{
+	if (cdx_rpmsg_send(cdx, hdr, hdr_len, sdu, sdu_len))
+		dev_err(&cdx->rpdev->dev, "Failed to send rpmsg data\n");
+}
+
+static const struct cdx_mcdi_ops mcdi_ops = {
+	.mcdi_rpc_timeout = cdx_mcdi_rpc_timeout,
+	.mcdi_request = cdx_mcdi_request,
+};
+
+void cdx_rpmsg_post_probe(struct cdx_controller *cdx)
+{
+	/* Register CDX controller with CDX bus driver */
+	if (cdx_register_controller(cdx))
+		dev_err(cdx->dev, "Failed to register CDX controller\n");
+}
+
+void cdx_rpmsg_pre_remove(struct cdx_controller *cdx)
+{
+	cdx_unregister_controller(cdx);
+	cdx_mcdi_wait_for_quiescence(cdx->priv, MCDI_RPC_TIMEOUT);
+}
+
+static int cdx_configure_device(struct cdx_controller *cdx,
+				u8 bus_num, u8 dev_num,
+				struct cdx_device_config *dev_config)
+{
+	int ret = 0;
+
+	switch (dev_config->type) {
+	case CDX_DEV_RESET_CONF:
+		ret = cdx_mcdi_reset_device(cdx->priv, bus_num, dev_num);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cdx_scan_devices(struct cdx_controller *cdx)
+{
+	struct cdx_mcdi *cdx_mcdi = cdx->priv;
+	u8 bus_num, dev_num, num_cdx_bus;
+	int ret;
+
+	/* MCDI FW Read: Fetch the number of CDX buses on this controller */
+	ret = cdx_mcdi_get_num_buses(cdx_mcdi);
+	if (ret < 0) {
+		dev_err(cdx->dev,
+			"Get number of CDX buses failed: %d\n", ret);
+		return ret;
+	}
+	num_cdx_bus = (u8)ret;
+
+	for (bus_num = 0; bus_num < num_cdx_bus; bus_num++) {
+		u8 num_cdx_dev;
+
+		/* MCDI FW Read: Fetch the number of devices present */
+		ret = cdx_mcdi_get_num_devs(cdx_mcdi, bus_num);
+		if (ret < 0) {
+			dev_err(cdx->dev,
+				"Get devices on CDX bus %d failed: %d\n", bus_num, ret);
+			continue;
+		}
+		num_cdx_dev = (u8)ret;
+
+		for (dev_num = 0; dev_num < num_cdx_dev; dev_num++) {
+			struct cdx_dev_params dev_params;
+
+			/* MCDI FW: Get the device config */
+			ret = cdx_mcdi_get_dev_config(cdx_mcdi, bus_num,
+						      dev_num, &dev_params);
+			if (ret) {
+				dev_err(cdx->dev,
+					"CDX device config get failed for %d(bus):%d(dev), %d\n",
+					bus_num, dev_num, ret);
+				continue;
+			}
+			dev_params.cdx = cdx;
+
+			/* Add the device to the cdx bus */
+			ret = cdx_device_add(&dev_params);
+			if (ret) {
+				dev_err(cdx->dev, "registering cdx dev: %d failed: %d\n",
+					dev_num, ret);
+				continue;
+			}
+
+			dev_dbg(cdx->dev, "CDX dev: %d on cdx bus: %d created\n",
+				dev_num, bus_num);
+		}
+	}
+
+	return 0;
+}
+
+static struct cdx_ops cdx_ops = {
+	.scan		= cdx_scan_devices,
+	.dev_configure	= cdx_configure_device,
+};
+
+static int xlnx_cdx_probe(struct platform_device *pdev)
+{
+	struct cdx_controller *cdx;
+	struct cdx_mcdi *cdx_mcdi;
+	int ret;
+
+	cdx_mcdi = kzalloc(sizeof(*cdx_mcdi), GFP_KERNEL);
+	if (!cdx_mcdi)
+		return -ENOMEM;
+
+	/* Store the MCDI ops */
+	cdx_mcdi->mcdi_ops = &mcdi_ops;
+	/* MCDI FW: Initialize the FW path */
+	ret = cdx_mcdi_init(cdx_mcdi);
+	if (ret) {
+		dev_err_probe(&pdev->dev, ret, "MCDI Initialization failed\n");
+		goto mcdi_init_fail;
+	}
+
+	cdx = kzalloc(sizeof(*cdx), GFP_KERNEL);
+	if (!cdx) {
+		ret = -ENOMEM;
+		goto cdx_alloc_fail;
+	}
+	platform_set_drvdata(pdev, cdx);
+
+	cdx->dev = &pdev->dev;
+	cdx->priv = cdx_mcdi;
+	cdx->ops = &cdx_ops;
+
+	ret = cdx_setup_rpmsg(pdev);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to register CDX RPMsg transport\n");
+		goto cdx_rpmsg_fail;
+	}
+
+	dev_info(&pdev->dev, "Successfully registered CDX controller with RPMsg as transport\n");
+	return 0;
+
+cdx_rpmsg_fail:
+	kfree(cdx);
+cdx_alloc_fail:
+	cdx_mcdi_finish(cdx_mcdi);
+mcdi_init_fail:
+	kfree(cdx_mcdi);
+
+	return ret;
+}
+
+static int xlnx_cdx_remove(struct platform_device *pdev)
+{
+	struct cdx_controller *cdx = platform_get_drvdata(pdev);
+	struct cdx_mcdi *cdx_mcdi = cdx->priv;
+
+	cdx_destroy_rpmsg(pdev);
+
+	kfree(cdx);
+
+	cdx_mcdi_finish(cdx_mcdi);
+	kfree(cdx_mcdi);
+
+	return 0;
+}
+
+static const struct of_device_id cdx_match_table[] = {
+	{.compatible = "xlnx,versal-net-cdx",},
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, cdx_match_table);
+
+static struct platform_driver cdx_pdriver = {
+	.driver = {
+		   .name = "cdx-controller",
+		   .pm = NULL,
+		   .of_match_table = cdx_match_table,
+		   },
+	.probe = xlnx_cdx_probe,
+	.remove = xlnx_cdx_remove,
+};
+
+static int __init cdx_controller_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&cdx_pdriver);
+	if (ret)
+		pr_err("platform_driver_register() failed: %d\n", ret);
+
+	return ret;
+}
+
+static void __exit cdx_controller_exit(void)
+{
+	platform_driver_unregister(&cdx_pdriver);
+}
+
+module_init(cdx_controller_init);
+module_exit(cdx_controller_exit);
+
+MODULE_AUTHOR("AMD Inc.");
+MODULE_DESCRIPTION("CDX controller for AMD devices");
+MODULE_LICENSE("GPL");