Merge tag 'char-misc-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big set of char and misc and other tiny driver subsystem
  updates for 5.16-rc1.

  Loads of things in here, all of which have been in linux-next for a
  while with no reported problems (except for one called out below.)

  Included are:

   - habanana labs driver updates, including dma_buf usage, reviewed and
     acked by the dma_buf maintainers

   - iio driver update (going through this tree not staging as they
     really do not belong going through that tree anymore)

   - counter driver updates

   - hwmon driver updates that the counter drivers needed, acked by the
     hwmon maintainer

   - xillybus driver updates

   - binder driver updates

   - extcon driver updates

   - dma_buf module namespaces added (will cause a build error in arm64
     for allmodconfig, but that change is on its way through the drm
     tree)

   - lkdtm driver updates

   - pvpanic driver updates

   - phy driver updates

   - virt acrn and nitr_enclaves driver updates

   - smaller char and misc driver updates"

* tag 'char-misc-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (386 commits)
  comedi: dt9812: fix DMA buffers on stack
  comedi: ni_usb6501: fix NULL-deref in command paths
  arm64: errata: Enable TRBE workaround for write to out-of-range address
  arm64: errata: Enable workaround for TRBE overwrite in FILL mode
  coresight: trbe: Work around write to out of range
  coresight: trbe: Make sure we have enough space
  coresight: trbe: Add a helper to determine the minimum buffer size
  coresight: trbe: Workaround TRBE errata overwrite in FILL mode
  coresight: trbe: Add infrastructure for Errata handling
  coresight: trbe: Allow driver to choose a different alignment
  coresight: trbe: Decouple buffer base from the hardware base
  coresight: trbe: Add a helper to pad a given buffer area
  coresight: trbe: Add a helper to calculate the trace generated
  coresight: trbe: Defer the probe on offline CPUs
  coresight: trbe: Fix incorrect access of the sink specific data
  coresight: etm4x: Add ETM PID for Kryo-5XX
  coresight: trbe: Prohibit trace before disabling TRBE
  coresight: trbe: End the AUX handle on truncation
  coresight: trbe: Do not truncate buffer on IRQ
  coresight: trbe: Fix handling of spurious interrupts
  ...

4 files changed, 288 insertions, 30 deletions

diff --git a/include/uapi/linux/acrn.h b/include/uapi/linux/acrn.h
index 353b2a2e4536..ccf47ed92500 100644
--- a/include/uapi/linux/acrn.h
+++ b/include/uapi/linux/acrn.h
@@ -396,6 +396,7 @@ struct acrn_ptdev_irq {
 /* Type of PCI device assignment */
 #define ACRN_PTDEV_QUIRK_ASSIGN	(1U << 0)
 
+#define ACRN_MMIODEV_RES_NUM	3
 #define ACRN_PCI_NUM_BARS	6
 /**
  * struct acrn_pcidev - Info for assigning or de-assigning a PCI device
@@ -418,6 +419,67 @@ struct acrn_pcidev {
 };
 
 /**
+ * struct acrn_mmiodev - Info for assigning or de-assigning a MMIO device
+ * @name:			Name of the MMIO device.
+ * @res[].user_vm_pa:		Physical address of User VM of the MMIO region
+ *				for the MMIO device.
+ * @res[].service_vm_pa:	Physical address of Service VM of the MMIO
+ *				region for the MMIO device.
+ * @res[].size:			Size of the MMIO region for the MMIO device.
+ * @res[].mem_type:		Memory type of the MMIO region for the MMIO
+ *				device.
+ *
+ * This structure will be passed to hypervisor directly.
+ */
+struct acrn_mmiodev {
+	__u8	name[8];
+	struct {
+		__u64	user_vm_pa;
+		__u64	service_vm_pa;
+		__u64	size;
+		__u64	mem_type;
+	} res[ACRN_MMIODEV_RES_NUM];
+};
+
+/**
+ * struct acrn_vdev - Info for creating or destroying a virtual device
+ * @id:				Union of identifier of the virtual device
+ * @id.value:			Raw data of the identifier
+ * @id.fields.vendor:		Vendor id of the virtual PCI device
+ * @id.fields.device:		Device id of the virtual PCI device
+ * @id.fields.legacy_id:	ID of the virtual device if not a PCI device
+ * @slot:			Virtual Bus/Device/Function of the virtual
+ *				device
+ * @io_base:			IO resource base address of the virtual device
+ * @io_size:			IO resource size of the virtual device
+ * @args:			Arguments for the virtual device creation
+ *
+ * The created virtual device can be a PCI device or a legacy device (e.g.
+ * a virtual UART controller) and it is emulated by the hypervisor. This
+ * structure will be passed to hypervisor directly.
+ */
+struct acrn_vdev {
+	/*
+	 * the identifier of the device, the low 32 bits represent the vendor
+	 * id and device id of PCI device and the high 32 bits represent the
+	 * device number of the legacy device
+	 */
+	union {
+		__u64 value;
+		struct {
+			__le16 vendor;
+			__le16 device;
+			__le32 legacy_id;
+		} fields;
+	} id;
+
+	__u64	slot;
+	__u32	io_addr[ACRN_PCI_NUM_BARS];
+	__u32	io_size[ACRN_PCI_NUM_BARS];
+	__u8	args[128];
+};
+
+/**
  * struct acrn_msi_entry - Info for injecting a MSI interrupt to a VM
  * @msi_addr:	MSI addr[19:12] with dest vCPU ID
  * @msi_data:	MSI data[7:0] with vector
@@ -568,6 +630,14 @@ struct acrn_irqfd {
 	_IOW(ACRN_IOCTL_TYPE, 0x55, struct acrn_pcidev)
 #define ACRN_IOCTL_DEASSIGN_PCIDEV	\
 	_IOW(ACRN_IOCTL_TYPE, 0x56, struct acrn_pcidev)
+#define ACRN_IOCTL_ASSIGN_MMIODEV	\
+	_IOW(ACRN_IOCTL_TYPE, 0x57, struct acrn_mmiodev)
+#define ACRN_IOCTL_DEASSIGN_MMIODEV	\
+	_IOW(ACRN_IOCTL_TYPE, 0x58, struct acrn_mmiodev)
+#define ACRN_IOCTL_CREATE_VDEV	\
+	_IOW(ACRN_IOCTL_TYPE, 0x59, struct acrn_vdev)
+#define ACRN_IOCTL_DESTROY_VDEV	\
+	_IOW(ACRN_IOCTL_TYPE, 0x5A, struct acrn_vdev)
 
 #define ACRN_IOCTL_PM_GET_CPU_STATE	\
 	_IOWR(ACRN_IOCTL_TYPE, 0x60, __u64)
diff --git a/include/uapi/linux/counter.h b/include/uapi/linux/counter.h
new file mode 100644
index 000000000000..d0aa95aeff7b
--- /dev/null
+++ b/include/uapi/linux/counter.h
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Userspace ABI for Counter character devices
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _UAPI_COUNTER_H_
+#define _UAPI_COUNTER_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/* Component type definitions */
+enum counter_component_type {
+	COUNTER_COMPONENT_NONE,
+	COUNTER_COMPONENT_SIGNAL,
+	COUNTER_COMPONENT_COUNT,
+	COUNTER_COMPONENT_FUNCTION,
+	COUNTER_COMPONENT_SYNAPSE_ACTION,
+	COUNTER_COMPONENT_EXTENSION,
+};
+
+/* Component scope definitions */
+enum counter_scope {
+	COUNTER_SCOPE_DEVICE,
+	COUNTER_SCOPE_SIGNAL,
+	COUNTER_SCOPE_COUNT,
+};
+
+/**
+ * struct counter_component - Counter component identification
+ * @type: component type (one of enum counter_component_type)
+ * @scope: component scope (one of enum counter_scope)
+ * @parent: parent ID (matching the ID suffix of the respective parent sysfs
+ *          path as described by the ABI documentation file
+ *          Documentation/ABI/testing/sysfs-bus-counter)
+ * @id: component ID (matching the ID provided by the respective *_component_id
+ *      sysfs attribute of the desired component)
+ *
+ * For example, if the Count 2 ceiling extension of Counter device 4 is desired,
+ * set type equal to COUNTER_COMPONENT_EXTENSION, scope equal to
+ * COUNTER_COUNT_SCOPE, parent equal to 2, and id equal to the value provided by
+ * the respective /sys/bus/counter/devices/counter4/count2/ceiling_component_id
+ * sysfs attribute.
+ */
+struct counter_component {
+	__u8 type;
+	__u8 scope;
+	__u8 parent;
+	__u8 id;
+};
+
+/* Event type definitions */
+enum counter_event_type {
+	/* Count value increased past ceiling */
+	COUNTER_EVENT_OVERFLOW,
+	/* Count value decreased past floor */
+	COUNTER_EVENT_UNDERFLOW,
+	/* Count value increased past ceiling, or decreased past floor */
+	COUNTER_EVENT_OVERFLOW_UNDERFLOW,
+	/* Count value reached threshold */
+	COUNTER_EVENT_THRESHOLD,
+	/* Index signal detected */
+	COUNTER_EVENT_INDEX,
+};
+
+/**
+ * struct counter_watch - Counter component watch configuration
+ * @component: component to watch when event triggers
+ * @event: event that triggers (one of enum counter_event_type)
+ * @channel: event channel (typically 0 unless the device supports concurrent
+ *	     events of the same type)
+ */
+struct counter_watch {
+	struct counter_component component;
+	__u8 event;
+	__u8 channel;
+};
+
+/*
+ * Queues a Counter watch for the specified event.
+ *
+ * The queued watches will not be applied until COUNTER_ENABLE_EVENTS_IOCTL is
+ * called.
+ */
+#define COUNTER_ADD_WATCH_IOCTL _IOW(0x3E, 0x00, struct counter_watch)
+/*
+ * Enables monitoring the events specified by the Counter watches that were
+ * queued by COUNTER_ADD_WATCH_IOCTL.
+ *
+ * If events are already enabled, the new set of watches replaces the old one.
+ * Calling this ioctl also has the effect of clearing the queue of watches added
+ * by COUNTER_ADD_WATCH_IOCTL.
+ */
+#define COUNTER_ENABLE_EVENTS_IOCTL _IO(0x3E, 0x01)
+/*
+ * Stops monitoring the previously enabled events.
+ */
+#define COUNTER_DISABLE_EVENTS_IOCTL _IO(0x3E, 0x02)
+
+/**
+ * struct counter_event - Counter event data
+ * @timestamp: best estimate of time of event occurrence, in nanoseconds
+ * @value: component value
+ * @watch: component watch configuration
+ * @status: return status (system error number)
+ */
+struct counter_event {
+	__aligned_u64 timestamp;
+	__aligned_u64 value;
+	struct counter_watch watch;
+	__u8 status;
+};
+
+/* Count direction values */
+enum counter_count_direction {
+	COUNTER_COUNT_DIRECTION_FORWARD,
+	COUNTER_COUNT_DIRECTION_BACKWARD,
+};
+
+/* Count mode values */
+enum counter_count_mode {
+	COUNTER_COUNT_MODE_NORMAL,
+	COUNTER_COUNT_MODE_RANGE_LIMIT,
+	COUNTER_COUNT_MODE_NON_RECYCLE,
+	COUNTER_COUNT_MODE_MODULO_N,
+};
+
+/* Count function values */
+enum counter_function {
+	COUNTER_FUNCTION_INCREASE,
+	COUNTER_FUNCTION_DECREASE,
+	COUNTER_FUNCTION_PULSE_DIRECTION,
+	COUNTER_FUNCTION_QUADRATURE_X1_A,
+	COUNTER_FUNCTION_QUADRATURE_X1_B,
+	COUNTER_FUNCTION_QUADRATURE_X2_A,
+	COUNTER_FUNCTION_QUADRATURE_X2_B,
+	COUNTER_FUNCTION_QUADRATURE_X4,
+};
+
+/* Signal values */
+enum counter_signal_level {
+	COUNTER_SIGNAL_LEVEL_LOW,
+	COUNTER_SIGNAL_LEVEL_HIGH,
+};
+
+/* Action mode values */
+enum counter_synapse_action {
+	COUNTER_SYNAPSE_ACTION_NONE,
+	COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+	COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+	COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+};
+
+#endif /* _UAPI_COUNTER_H_ */
diff --git a/include/uapi/linux/nitro_enclaves.h b/include/uapi/linux/nitro_enclaves.h
index b945073fe544..e808f5ba124d 100644
--- a/include/uapi/linux/nitro_enclaves.h
+++ b/include/uapi/linux/nitro_enclaves.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
- * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * Copyright 2020-2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  */
 
 #ifndef _UAPI_LINUX_NITRO_ENCLAVES_H_
@@ -60,7 +60,7 @@
  *
  * Context: Process context.
  * Return:
- * * 0					- Logic succesfully completed.
+ * * 0					- Logic successfully completed.
  * *  -1				- There was a failure in the ioctl logic.
  * On failure, errno is set to:
  * * EFAULT				- copy_from_user() / copy_to_user() failure.
@@ -95,7 +95,7 @@
  *
  * Context: Process context.
  * Return:
- * * 0				- Logic succesfully completed.
+ * * 0				- Logic successfully completed.
  * *  -1			- There was a failure in the ioctl logic.
  * On failure, errno is set to:
  * * EFAULT			- copy_from_user() / copy_to_user() failure.
@@ -118,7 +118,7 @@
  *
  * Context: Process context.
  * Return:
- * * 0					- Logic succesfully completed.
+ * * 0					- Logic successfully completed.
  * *  -1				- There was a failure in the ioctl logic.
  * On failure, errno is set to:
  * * EFAULT				- copy_from_user() failure.
@@ -161,7 +161,7 @@
  *
  * Context: Process context.
  * Return:
- * * 0					- Logic succesfully completed.
+ * * 0					- Logic successfully completed.
  * *  -1				- There was a failure in the ioctl logic.
  * On failure, errno is set to:
  * * EFAULT				- copy_from_user() / copy_to_user() failure.
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index d13bb8c1b450..00b309590499 100644
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -272,6 +272,16 @@ enum hl_gaudi_pll_index {
 	HL_GAUDI_PLL_MAX
 };
 
+/**
+ * enum hl_device_status - Device status information.
+ * @HL_DEVICE_STATUS_OPERATIONAL: Device is operational.
+ * @HL_DEVICE_STATUS_IN_RESET: Device is currently during reset.
+ * @HL_DEVICE_STATUS_MALFUNCTION: Device is unusable.
+ * @HL_DEVICE_STATUS_NEEDS_RESET: Device needs reset because auto reset was disabled.
+ * @HL_DEVICE_STATUS_IN_DEVICE_CREATION: Device is operational but its creation is still in
+ *                                       progress.
+ * @HL_DEVICE_STATUS_LAST: Last status.
+ */
 enum hl_device_status {
 	HL_DEVICE_STATUS_OPERATIONAL,
 	HL_DEVICE_STATUS_IN_RESET,
@@ -556,33 +566,30 @@ enum gaudi_dcores {
 	HL_GAUDI_ES_DCORE
 };
 
+/**
+ * struct hl_info_args - Main structure to retrieve device related information.
+ * @return_pointer: User space address of the relevant structure related to HL_INFO_* operation
+ *                  mentioned in @op.
+ * @return_size: Size of the structure used in @return_pointer, just like "size" in "snprintf", it
+ *               limits how many bytes the kernel can write. For hw_events array, the size should be
+ *               hl_info_hw_ip_info.num_of_events * sizeof(__u32).
+ * @op: Defines which type of information to be retrieved. Refer HL_INFO_* for details.
+ * @dcore_id: DCORE id for which the information is relevant (for Gaudi refer to enum gaudi_dcores).
+ * @ctx_id: Context ID of the user. Currently not in use.
+ * @period_ms: Period value, in milliseconds, for utilization rate in range 100ms - 1000ms in 100 ms
+ *             resolution. Currently not in use.
+ * @pll_index: Index as defined in hl_<asic type>_pll_index enumeration.
+ * @pad: Padding to 64 bit.
+ */
 struct hl_info_args {
-	/* Location of relevant struct in userspace */
 	__u64 return_pointer;
-	/*
-	 * The size of the return value. Just like "size" in "snprintf",
-	 * it limits how many bytes the kernel can write
-	 *
-	 * For hw_events array, the size should be
-	 * hl_info_hw_ip_info.num_of_events * sizeof(__u32)
-	 */
 	__u32 return_size;
-
-	/* HL_INFO_* */
 	__u32 op;
 
 	union {
-		/* Dcore id for which the information is relevant.
-		 * For Gaudi refer to 'enum gaudi_dcores'
-		 */
 		__u32 dcore_id;
-		/* Context ID - Currently not in use */
 		__u32 ctx_id;
-		/* Period value for utilization rate (100ms - 1000ms, in 100ms
-		 * resolution.
-		 */
 		__u32 period_ms;
-		/* PLL frequency retrieval */
 		__u32 pll_index;
 	};
 
@@ -890,11 +897,7 @@ struct hl_wait_cs_in {
 			 */
 			__u64 addr;
 			/* Target value for completion comparison */
-			__u32 target;
-			/* Absolute timeout to wait for interrupt
-			 * in microseconds
-			 */
-			__u32 interrupt_timeout_us;
+			__u64 target;
 		};
 	};
 
@@ -910,7 +913,12 @@ struct hl_wait_cs_in {
 
 	/* Multi CS API info- valid entries in multi-CS array */
 	__u8 seq_arr_len;
-	__u8 pad[7];
+	__u8 pad[3];
+
+	/* Absolute timeout to wait for an interrupt in microseconds.
+	 * Relevant only when HL_WAIT_CS_FLAGS_INTERRUPT is set
+	 */
+	__u32 interrupt_timeout_us;
 };
 
 #define HL_WAIT_CS_STATUS_COMPLETED	0
@@ -952,6 +960,10 @@ union hl_wait_cs_args {
 #define HL_MEM_OP_UNMAP			3
 /* Opcode to map a hw block */
 #define HL_MEM_OP_MAP_BLOCK		4
+/* Opcode to create DMA-BUF object for an existing device memory allocation
+ * and to export an FD of that DMA-BUF back to the caller
+ */
+#define HL_MEM_OP_EXPORT_DMABUF_FD	5
 
 /* Memory flags */
 #define HL_MEM_CONTIGUOUS	0x1
@@ -1023,11 +1035,26 @@ struct hl_mem_in {
 			/* Virtual address returned from HL_MEM_OP_MAP */
 			__u64 device_virt_addr;
 		} unmap;
+
+		/* HL_MEM_OP_EXPORT_DMABUF_FD */
+		struct {
+			/* Handle returned from HL_MEM_OP_ALLOC. In Gaudi,
+			 * where we don't have MMU for the device memory, the
+			 * driver expects a physical address (instead of
+			 * a handle) in the device memory space.
+			 */
+			__u64 handle;
+			/* Size of memory allocation. Relevant only for GAUDI */
+			__u64 mem_size;
+		} export_dmabuf_fd;
 	};
 
 	/* HL_MEM_OP_* */
 	__u32 op;
-	/* HL_MEM_* flags */
+	/* HL_MEM_* flags.
+	 * For the HL_MEM_OP_EXPORT_DMABUF_FD opcode, this field holds the
+	 * DMA-BUF file/FD flags.
+	 */
 	__u32 flags;
 	/* Context ID - Currently not in use */
 	__u32 ctx_id;
@@ -1064,6 +1091,13 @@ struct hl_mem_out {
 
 			__u32 pad;
 		};
+
+		/* Returned in HL_MEM_OP_EXPORT_DMABUF_FD. Represents the
+		 * DMA-BUF object that was created to describe a memory
+		 * allocation on the device's memory space. The FD should be
+		 * passed to the importer driver
+		 */
+		__s32 fd;
 	};
 };