Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 216 insertions, 0 deletions

diff --git a/drivers/comedi/comedi_pci.c b/drivers/comedi/comedi_pci.c
new file mode 100644
index 000000000..da618f5e3
--- /dev/null
+++ b/drivers/comedi/comedi_pci.c
@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * comedi_pci.c
+ * Comedi PCI driver specific functions.
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/comedi/comedi_pci.h>
+
+/**
+ * comedi_to_pci_dev() - Return PCI device attached to COMEDI device
+ * @dev: COMEDI device.
+ *
+ * Assuming @dev->hw_dev is non-%NULL, it is assumed to be pointing to a
+ * a &struct device embedded in a &struct pci_dev.
+ *
+ * Return: Attached PCI device if @dev->hw_dev is non-%NULL.
+ * Return %NULL if @dev->hw_dev is %NULL.
+ */
+struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev)
+{
+	return dev->hw_dev ? to_pci_dev(dev->hw_dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_pci_dev);
+
+/**
+ * comedi_pci_enable() - Enable the PCI device and request the regions
+ * @dev: COMEDI device.
+ *
+ * Assuming @dev->hw_dev is non-%NULL, it is assumed to be pointing to a
+ * a &struct device embedded in a &struct pci_dev.  Enable the PCI device
+ * and request its regions.  Set @dev->ioenabled to %true if successful,
+ * otherwise undo what was done.
+ *
+ * Calls to comedi_pci_enable() and comedi_pci_disable() cannot be nested.
+ *
+ * Return:
+ *	0 on success,
+ *	-%ENODEV if @dev->hw_dev is %NULL,
+ *	-%EBUSY if regions busy,
+ *	or some negative error number if failed to enable PCI device.
+ *
+ */
+int comedi_pci_enable(struct comedi_device *dev)
+{
+	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+	int rc;
+
+	if (!pcidev)
+		return -ENODEV;
+
+	rc = pci_enable_device(pcidev);
+	if (rc < 0)
+		return rc;
+
+	rc = pci_request_regions(pcidev, dev->board_name);
+	if (rc < 0)
+		pci_disable_device(pcidev);
+	else
+		dev->ioenabled = true;
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(comedi_pci_enable);
+
+/**
+ * comedi_pci_disable() - Release the regions and disable the PCI device
+ * @dev: COMEDI device.
+ *
+ * Assuming @dev->hw_dev is non-%NULL, it is assumed to be pointing to a
+ * a &struct device embedded in a &struct pci_dev.  If the earlier call
+ * to comedi_pci_enable() was successful, release the PCI device's regions
+ * and disable it.  Reset @dev->ioenabled back to %false.
+ */
+void comedi_pci_disable(struct comedi_device *dev)
+{
+	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+
+	if (pcidev && dev->ioenabled) {
+		pci_release_regions(pcidev);
+		pci_disable_device(pcidev);
+	}
+	dev->ioenabled = false;
+}
+EXPORT_SYMBOL_GPL(comedi_pci_disable);
+
+/**
+ * comedi_pci_detach() - A generic "detach" handler for PCI COMEDI drivers
+ * @dev: COMEDI device.
+ *
+ * COMEDI drivers for PCI devices that need no special clean-up of private data
+ * and have no ioremapped regions other than that pointed to by @dev->mmio may
+ * use this function as its "detach" handler called by the COMEDI core when a
+ * COMEDI device is being detached from the low-level driver.  It may be also
+ * called from a more specific "detach" handler that does additional clean-up.
+ *
+ * Free the IRQ if @dev->irq is non-zero, iounmap @dev->mmio if it is
+ * non-%NULL, and call comedi_pci_disable() to release the PCI device's regions
+ * and disable it.
+ */
+void comedi_pci_detach(struct comedi_device *dev)
+{
+	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+
+	if (!pcidev || !dev->ioenabled)
+		return;
+
+	if (dev->irq) {
+		free_irq(dev->irq, dev);
+		dev->irq = 0;
+	}
+	if (dev->mmio) {
+		iounmap(dev->mmio);
+		dev->mmio = NULL;
+	}
+	comedi_pci_disable(dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_detach);
+
+/**
+ * comedi_pci_auto_config() - Configure/probe a PCI COMEDI device
+ * @pcidev: PCI device.
+ * @driver: Registered COMEDI driver.
+ * @context: Driver specific data, passed to comedi_auto_config().
+ *
+ * Typically called from the pci_driver (*probe) function.  Auto-configure
+ * a COMEDI device, using the &struct device embedded in *@pcidev as the
+ * hardware device.  The @context value gets passed through to @driver's
+ * "auto_attach" handler.  The "auto_attach" handler may call
+ * comedi_to_pci_dev() on the passed in COMEDI device to recover @pcidev.
+ *
+ * Return: The result of calling comedi_auto_config() (0 on success, or
+ * a negative error number on failure).
+ */
+int comedi_pci_auto_config(struct pci_dev *pcidev,
+			   struct comedi_driver *driver,
+			   unsigned long context)
+{
+	return comedi_auto_config(&pcidev->dev, driver, context);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_auto_config);
+
+/**
+ * comedi_pci_auto_unconfig() - Unconfigure/remove a PCI COMEDI device
+ * @pcidev: PCI device.
+ *
+ * Typically called from the pci_driver (*remove) function.  Auto-unconfigure
+ * a COMEDI device attached to this PCI device, using a pointer to the
+ * &struct device embedded in *@pcidev as the hardware device.  The COMEDI
+ * driver's "detach" handler will be called during unconfiguration of the
+ * COMEDI device.
+ *
+ * Note that the COMEDI device may have already been unconfigured using the
+ * %COMEDI_DEVCONFIG ioctl, in which case this attempt to unconfigure it
+ * again should be ignored.
+ */
+void comedi_pci_auto_unconfig(struct pci_dev *pcidev)
+{
+	comedi_auto_unconfig(&pcidev->dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig);
+
+/**
+ * comedi_pci_driver_register() - Register a PCI COMEDI driver
+ * @comedi_driver: COMEDI driver to be registered.
+ * @pci_driver: PCI driver to be registered.
+ *
+ * This function is called from the module_init() of PCI COMEDI driver modules
+ * to register the COMEDI driver and the PCI driver.  Do not call it directly,
+ * use the module_comedi_pci_driver() helper macro instead.
+ *
+ * Return: 0 on success, or a negative error number on failure.
+ */
+int comedi_pci_driver_register(struct comedi_driver *comedi_driver,
+			       struct pci_driver *pci_driver)
+{
+	int ret;
+
+	ret = comedi_driver_register(comedi_driver);
+	if (ret < 0)
+		return ret;
+
+	ret = pci_register_driver(pci_driver);
+	if (ret < 0) {
+		comedi_driver_unregister(comedi_driver);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(comedi_pci_driver_register);
+
+/**
+ * comedi_pci_driver_unregister() - Unregister a PCI COMEDI driver
+ * @comedi_driver: COMEDI driver to be unregistered.
+ * @pci_driver: PCI driver to be unregistered.
+ *
+ * This function is called from the module_exit() of PCI COMEDI driver modules
+ * to unregister the PCI driver and the COMEDI driver.  Do not call it
+ * directly, use the module_comedi_pci_driver() helper macro instead.
+ */
+void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver,
+				  struct pci_driver *pci_driver)
+{
+	pci_unregister_driver(pci_driver);
+	comedi_driver_unregister(comedi_driver);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister);
+
+MODULE_AUTHOR("https://www.comedi.org");
+MODULE_DESCRIPTION("Comedi PCI interface module");
+MODULE_LICENSE("GPL");