Merge branch 'topic/midi20' into for-next

This is a (largish) patch set for adding the support of MIDI 2.0
functionality, mainly targeted for USB devices.  MIDI 2.0 is a
complete overhaul of the 40-years old MIDI 1.0.  Unlike MIDI 1.0 byte
stream, MIDI 2.0 uses packets in 32bit words for Universal MIDI Packet
(UMP) protocol.  It supports both MIDI 1.0 commands for compatibility
and the extended MIDI 2.0 commands for higher resolutions and more
functions.

For supporting the UMP, the patch set extends the existing ALSA
rawmidi and sequencer interfaces, and adds the USB MIDI 2.0 support to
the standard USB-audio driver.

The rawmidi for UMP has a different device name (/dev/snd/umpC*D*) and
it reads/writes UMP packet data in 32bit CPU-native endianness.  For
the old MIDI 1.0 applications, the legacy rawmidi interface is
provided, too.

As default, USB-audio driver will take the alternate setting for MIDI
2.0 interface, and the compatibility with MIDI 1.0 is provided via the
rawmidi common layer.  However, user may let the driver falling back
to the old MIDI 1.0 interface by a module option, too.

A UMP-capable rawmidi device can create the corresponding ALSA
sequencer client(s) to support the UMP Endpoint and UMP Group
connections.  As a nature of ALSA sequencer, arbitrary connections
between clients/ports are allowed, and the ALSA sequencer core
performs the automatic conversions for the connections between a new
UMP sequencer client and a legacy MIDI 1.0 sequencer client.  It
allows the existing application to use MIDI 2.0 devices without
changes.

The MIDI-CI, which is another major extension in MIDI 2.0, isn't
covered by this patch set.  It would be implemented rather in
user-space.

Roughly speaking, the first half of this patch set is for extending
the rawmidi and USB-audio, and the second half is for extending the
ALSA sequencer interface.

The patch set is based on 6.4-rc2 kernel, but all patches can be
cleanly applicable on 6.2 and 6.3 kernels, too (while 6.1 and older
kernels would need minor adjustment for uapi header changes).

The updates for alsa-lib and alsa-utils will follow shortly later.

The author thanks members of MIDI Association OS/API Working Group,
especially Andrew Mee, for great helps for the initial design and
debugging / testing the drivers.

Link: https://lore.kernel.org/r/20230523075358.9672-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

17 files changed, 995 insertions, 34 deletions

diff --git a/include/drm/display/drm_dp.h b/include/drm/display/drm_dp.h
index 358db4a9f167..f8813c1e059b 100644
--- a/include/drm/display/drm_dp.h
+++ b/include/drm/display/drm_dp.h
@@ -286,9 +286,8 @@
 
 #define DP_DSC_MAX_BITS_PER_PIXEL_HI        0x068   /* eDP 1.4 */
 # define DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK  (0x3 << 0)
-# define DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT 8
-# define DP_DSC_MAX_BPP_DELTA_VERSION_MASK  0x06
-# define DP_DSC_MAX_BPP_DELTA_AVAILABILITY  0x08
+# define DP_DSC_MAX_BPP_DELTA_VERSION_MASK  (0x3 << 5)	/* eDP 1.5 & DP 2.0 */
+# define DP_DSC_MAX_BPP_DELTA_AVAILABILITY  (1 << 7)	/* eDP 1.5 & DP 2.0 */
 
 #define DP_DSC_DEC_COLOR_FORMAT_CAP         0x069
 # define DP_DSC_RGB                         (1 << 0)
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h
index 533d3ee7fe05..86f24a759268 100644
--- a/include/drm/display/drm_dp_helper.h
+++ b/include/drm/display/drm_dp_helper.h
@@ -181,9 +181,8 @@ static inline u16
 drm_edp_dsc_sink_output_bpp(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
 {
 	return dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_LOW - DP_DSC_SUPPORT] |
-		(dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_HI - DP_DSC_SUPPORT] &
-		 DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK <<
-		 DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT);
+		((dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_HI - DP_DSC_SUPPORT] &
+		  DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK) << 8);
 }
 
 static inline u32
diff --git a/include/linux/dim.h b/include/linux/dim.h
index 6c5733981563..f343bc9aa2ec 100644
--- a/include/linux/dim.h
+++ b/include/linux/dim.h
@@ -236,8 +236,9 @@ void dim_park_tired(struct dim *dim);
  *
  * Calculate the delta between two samples (in data rates).
  * Takes into consideration counter wrap-around.
+ * Returned boolean indicates whether curr_stats are reliable.
  */
-void dim_calc_stats(struct dim_sample *start, struct dim_sample *end,
+bool dim_calc_stats(struct dim_sample *start, struct dim_sample *end,
 		    struct dim_stats *curr_stats);
 
 /**
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 0f40f379d75c..6ba71957851e 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -637,6 +637,23 @@ static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
 	return __vlan_get_protocol(skb, skb->protocol, NULL);
 }
 
+/* This version of __vlan_get_protocol() also pulls mac header in skb->head */
+static inline __be16 vlan_get_protocol_and_depth(struct sk_buff *skb,
+						 __be16 type, int *depth)
+{
+	int maclen;
+
+	type = __vlan_get_protocol(skb, type, &maclen);
+
+	if (type) {
+		if (!pskb_may_pull(skb, maclen))
+			type = 0;
+		else if (depth)
+			*depth = maclen;
+	}
+	return type;
+}
+
 /* A getter for the SKB protocol field which will handle VLAN tags consistently
  * whether VLAN acceleration is enabled or not.
  */
diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index 3399d979ee1c..7fe31b2cd02f 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h
@@ -36,6 +36,11 @@ struct io_uring_cmd {
 	u8		pdu[32]; /* available inline for free use */
 };
 
+static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
+{
+	return sqe->cmd;
+}
+
 #if defined(CONFIG_IO_URING)
 int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
 			      struct iov_iter *iter, void *ioucmd);
@@ -66,11 +71,6 @@ static inline void io_uring_free(struct task_struct *tsk)
 	if (tsk->io_uring)
 		__io_uring_free(tsk);
 }
-
-static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
-{
-	return sqe->cmd;
-}
 #else
 static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
 			      struct iov_iter *iter, void *ioucmd)
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 45c3d62e616d..95f33dadb2be 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -567,6 +567,7 @@
 #define PCI_DEVICE_ID_AMD_19H_M50H_DF_F3 0x166d
 #define PCI_DEVICE_ID_AMD_19H_M60H_DF_F3 0x14e3
 #define PCI_DEVICE_ID_AMD_19H_M70H_DF_F3 0x14f3
+#define PCI_DEVICE_ID_AMD_19H_M78H_DF_F3 0x12fb
 #define PCI_DEVICE_ID_AMD_CNB17H_F3	0x1703
 #define PCI_DEVICE_ID_AMD_LANCE		0x2000
 #define PCI_DEVICE_ID_AMD_LANCE_HOME	0x2001
diff --git a/include/linux/usb/midi-v2.h b/include/linux/usb/midi-v2.h
new file mode 100644
index 000000000000..ebbffcae0417
--- /dev/null
+++ b/include/linux/usb/midi-v2.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * <linux/usb/midi-v2.h> -- USB MIDI 2.0 definitions.
+ */
+
+#ifndef __LINUX_USB_MIDI_V2_H
+#define __LINUX_USB_MIDI_V2_H
+
+#include <linux/types.h>
+#include <linux/usb/midi.h>
+
+/* A.1 MS Class-Specific Interface Descriptor Types */
+#define USB_DT_CS_GR_TRM_BLOCK	0x26
+
+/* A.1 MS Class-Specific Interface Descriptor Subtypes */
+/* same as MIDI 1.0 */
+
+/* A.2 MS Class-Specific Endpoint Descriptor Subtypes */
+#define USB_MS_GENERAL_2_0	0x02
+
+/* A.3 MS Class-Specific Group Terminal Block Descriptor Subtypes */
+#define USB_MS_GR_TRM_BLOCK_UNDEFINED	0x00
+#define USB_MS_GR_TRM_BLOCK_HEADER	0x01
+#define USB_MS_GR_TRM_BLOCK		0x02
+
+/* A.4 MS Interface Header MIDIStreaming Class Revision */
+#define USB_MS_REV_MIDI_1_0		0x0100
+#define USB_MS_REV_MIDI_2_0		0x0200
+
+/* A.5 MS MIDI IN and OUT Jack Types */
+/* same as MIDI 1.0 */
+
+/* A.6 Group Terminal Block Types */
+#define USB_MS_GR_TRM_BLOCK_TYPE_BIDIRECTIONAL	0x00
+#define USB_MS_GR_TRM_BLOCK_TYPE_INPUT_ONLY	0x01
+#define USB_MS_GR_TRM_BLOCK_TYPE_OUTPUT_ONLY	0x02
+
+/* A.7 Group Terminal Default MIDI Protocol */
+#define USB_MS_MIDI_PROTO_UNKNOWN	0x00 /* Unknown (Use MIDI-CI) */
+#define USB_MS_MIDI_PROTO_1_0_64	0x01 /* MIDI 1.0, UMP up to 64bits */
+#define USB_MS_MIDI_PROTO_1_0_64_JRTS	0x02 /* MIDI 1.0, UMP up to 64bits, Jitter Reduction Timestamps */
+#define USB_MS_MIDI_PROTO_1_0_128	0x03 /* MIDI 1.0, UMP up to 128bits */
+#define USB_MS_MIDI_PROTO_1_0_128_JRTS	0x04 /* MIDI 1.0, UMP up to 128bits, Jitter Reduction Timestamps */
+#define USB_MS_MIDI_PROTO_2_0		0x11 /* MIDI 2.0 */
+#define USB_MS_MIDI_PROTO_2_0_JRTS	0x12 /* MIDI 2.0, Jitter Reduction Timestamps */
+
+/* 5.2.2.1 Class-Specific MS Interface Header Descriptor */
+/* Same as MIDI 1.0, use struct usb_ms_header_descriptor */
+
+/* 5.3.2 Class-Specific MIDI Streaming Data Endpoint Descriptor */
+struct usb_ms20_endpoint_descriptor {
+	__u8  bLength;			/* 4+n */
+	__u8  bDescriptorType;		/* USB_DT_CS_ENDPOINT */
+	__u8  bDescriptorSubtype;	/* USB_MS_GENERAL_2_0 */
+	__u8  bNumGrpTrmBlock;		/* Number of Group Terminal Blocks: n */
+	__u8  baAssoGrpTrmBlkID[];	/* ID of the Group Terminal Blocks [n] */
+} __packed;
+
+#define USB_DT_MS20_ENDPOINT_SIZE(n)	(4 + (n))
+
+/* As above, but more useful for defining your own descriptors: */
+#define DECLARE_USB_MS20_ENDPOINT_DESCRIPTOR(n)			\
+struct usb_ms20_endpoint_descriptor_##n {			\
+	__u8  bLength;						\
+	__u8  bDescriptorType;					\
+	__u8  bDescriptorSubtype;				\
+	__u8  bNumGrpTrmBlock;					\
+	__u8  baAssoGrpTrmBlkID[n];				\
+} __packed
+
+/* 5.4.1 Class-Specific Group Terminal Block Header Descriptor */
+struct usb_ms20_gr_trm_block_header_descriptor {
+	__u8  bLength;			/* 5 */
+	__u8  bDescriptorType;		/* USB_DT_CS_GR_TRM_BLOCK */
+	__u8  bDescriptorSubtype;	/* USB_MS_GR_TRM_BLOCK_HEADER */
+	__u16 wTotalLength;		/* Total number of bytes */
+} __packed;
+
+/* 5.4.2.1 Group Terminal Block Descriptor */
+struct usb_ms20_gr_trm_block_descriptor {
+	__u8  bLength;			/* 13 */
+	__u8  bDescriptorType;		/* USB_DT_CS_GR_TRM_BLOCK */
+	__u8  bDescriptorSubtype;	/* USB_MS_GR_TRM_BLOCK */
+	__u8  bGrpTrmBlkID;		/* ID of this Group Terminal Block */
+	__u8  bGrpTrmBlkType;		/* Group Terminal Block Type */
+	__u8  nGroupTrm;		/* The first member Group Terminal in this block */
+	__u8  nNumGroupTrm;		/* Number of member Group Terminals spanned */
+	__u8  iBlockItem;		/* String ID of Block item */
+	__u8  bMIDIProtocol;		/* Default MIDI protocol */
+	__u16 wMaxInputBandwidth;	/* Max input bandwidth capability in 4kB/s */
+	__u16 wMaxOutputBandwidth;	/* Max output bandwidth capability in 4kB/s */
+} __packed;
+
+#endif /* __LINUX_USB_MIDI_V2_H */
diff --git a/include/net/bonding.h b/include/net/bonding.h
index a60a24923b55..0efef2a952b7 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -233,7 +233,7 @@ struct bonding {
 	 */
 	spinlock_t mode_lock;
 	spinlock_t stats_lock;
-	u8	 send_peer_notif;
+	u32	 send_peer_notif;
 	u8       igmp_retrans;
 #ifdef CONFIG_PROC_FS
 	struct   proc_dir_entry *proc_entry;
diff --git a/include/net/sock.h b/include/net/sock.h
index 8b7ed7167243..656ea89f60ff 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2718,7 +2718,7 @@ static inline void sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
 		__sock_recv_cmsgs(msg, sk, skb);
 	else if (unlikely(sock_flag(sk, SOCK_TIMESTAMP)))
 		sock_write_timestamp(sk, skb->tstamp);
-	else if (unlikely(sk->sk_stamp == SK_DEFAULT_STAMP))
+	else if (unlikely(sock_read_timestamp(sk) == SK_DEFAULT_STAMP))
 		sock_write_timestamp(sk, 0);
 }
 
diff --git a/include/sound/asequencer.h b/include/sound/asequencer.h
index 18d4bc3ee0b7..ddbb6bf801bb 100644
--- a/include/sound/asequencer.h
+++ b/include/sound/asequencer.h
@@ -65,6 +65,10 @@
 #define snd_seq_ev_is_abstime(ev)	(snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_ABS)
 #define snd_seq_ev_is_reltime(ev)	(snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_REL)
 
+/* check whether the given event is a UMP event */
+#define snd_seq_ev_is_ump(ev) \
+	(IS_ENABLED(CONFIG_SND_SEQ_UMP) && ((ev)->flags & SNDRV_SEQ_EVENT_UMP))
+
 /* queue sync port */
 #define snd_seq_queue_sync_port(q)	((q) + 16)
 
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
index e1f59b2940af..b0197b1d1fe4 100644
--- a/include/sound/rawmidi.h
+++ b/include/sound/rawmidi.h
@@ -18,6 +18,7 @@
 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
 #include <sound/seq_device.h>
 #endif
+#include <sound/info.h>
 
 /*
  *  Raw MIDI interface
@@ -47,6 +48,10 @@ struct snd_rawmidi_global_ops {
 	int (*dev_unregister) (struct snd_rawmidi * rmidi);
 	void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
 			      struct snd_seq_port_info *info);
+	long (*ioctl)(struct snd_rawmidi *rmidi, unsigned int cmd,
+		      void __user *argp);
+	void (*proc_read)(struct snd_info_entry *entry,
+			  struct snd_info_buffer *buf);
 };
 
 struct snd_rawmidi_runtime {
@@ -61,6 +66,7 @@ struct snd_rawmidi_runtime {
 	size_t avail_min;	/* min avail for wakeup */
 	size_t avail;		/* max used buffer for wakeup */
 	size_t xruns;		/* over/underruns counter */
+	size_t align;		/* alignment (0 = byte stream, 3 = UMP) */
 	int buffer_ref;		/* buffer reference count */
 	/* misc */
 	wait_queue_head_t sleep;
@@ -146,6 +152,13 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
 			 const struct snd_rawmidi_ops *ops);
 
+/* internal */
+int snd_rawmidi_init(struct snd_rawmidi *rmidi,
+		     struct snd_card *card, char *id, int device,
+		     int output_count, int input_count,
+		     unsigned int info_flags);
+int snd_rawmidi_free(struct snd_rawmidi *rmidi);
+
 /* callbacks */
 
 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
@@ -161,7 +174,7 @@ int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream);
 /* main midi functions */
 
 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
-int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
+int snd_rawmidi_kernel_open(struct snd_rawmidi *rmidi, int subdevice,
 			    int mode, struct snd_rawmidi_file *rfile);
 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
diff --git a/include/sound/seq_device.h b/include/sound/seq_device.h
index 8899affe9155..dead74b022f4 100644
--- a/include/sound/seq_device.h
+++ b/include/sound/seq_device.h
@@ -78,5 +78,6 @@ void snd_seq_driver_unregister(struct snd_seq_driver *drv);
  */
 #define SNDRV_SEQ_DEV_ID_MIDISYNTH	"seq-midi"
 #define SNDRV_SEQ_DEV_ID_OPL3		"opl3-synth"
+#define SNDRV_SEQ_DEV_ID_UMP		"seq-ump-client"
 
 #endif /* __SOUND_SEQ_DEVICE_H */
diff --git a/include/sound/seq_kernel.h b/include/sound/seq_kernel.h
index 658911926f3a..c8621671fa70 100644
--- a/include/sound/seq_kernel.h
+++ b/include/sound/seq_kernel.h
@@ -70,9 +70,19 @@ int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg);
 typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count);
 int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf,
 			     int in_kernel, int size_aligned);
+int snd_seq_expand_var_event_at(const struct snd_seq_event *event, int count,
+				char *buf, int offset);
 int snd_seq_dump_var_event(const struct snd_seq_event *event,
 			   snd_seq_dump_func_t func, void *private_data);
 
+/* size of the event packet; it can be greater than snd_seq_event size */
+static inline size_t snd_seq_event_packet_size(struct snd_seq_event *ev)
+{
+	if (snd_seq_ev_is_ump(ev))
+		return sizeof(struct snd_seq_ump_event);
+	return sizeof(struct snd_seq_event);
+}
+
 /* interface for OSS emulation */
 int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo);
 
diff --git a/include/sound/ump.h b/include/sound/ump.h
new file mode 100644
index 000000000000..e4fdf7cccf12
--- /dev/null
+++ b/include/sound/ump.h
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Universal MIDI Packet (UMP) Support
+ */
+#ifndef __SOUND_UMP_H
+#define __SOUND_UMP_H
+
+#include <sound/rawmidi.h>
+
+struct snd_ump_endpoint;
+struct snd_ump_block;
+struct snd_ump_ops;
+struct ump_cvt_to_ump;
+struct snd_seq_ump_ops;
+
+struct snd_ump_endpoint {
+	struct snd_rawmidi core;	/* raw UMP access */
+
+	struct snd_ump_endpoint_info info;
+
+	const struct snd_ump_ops *ops;	/* UMP ops set by the driver */
+	struct snd_rawmidi_substream *substreams[2];	/* opened substreams */
+
+	void *private_data;
+	void (*private_free)(struct snd_ump_endpoint *ump);
+
+	struct list_head block_list;	/* list of snd_ump_block objects */
+
+	/* intermediate buffer for UMP input */
+	u32 input_buf[4];
+	int input_buf_head;
+	int input_pending;
+
+	struct mutex open_mutex;
+
+#if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
+	spinlock_t legacy_locks[2];
+	struct snd_rawmidi *legacy_rmidi;
+	struct snd_rawmidi_substream *legacy_substreams[2][SNDRV_UMP_MAX_GROUPS];
+
+	/* for legacy output; need to open the actual substream unlike input */
+	int legacy_out_opens;
+	struct snd_rawmidi_file legacy_out_rfile;
+	struct ump_cvt_to_ump *out_cvts;
+#endif
+
+#if IS_ENABLED(CONFIG_SND_SEQUENCER)
+	struct snd_seq_device *seq_dev;
+	const struct snd_seq_ump_ops *seq_ops;
+	void *seq_client;
+#endif
+};
+
+/* ops filled by UMP drivers */
+struct snd_ump_ops {
+	int (*open)(struct snd_ump_endpoint *ump, int dir);
+	void (*close)(struct snd_ump_endpoint *ump, int dir);
+	void (*trigger)(struct snd_ump_endpoint *ump, int dir, int up);
+	void (*drain)(struct snd_ump_endpoint *ump, int dir);
+};
+
+/* ops filled by sequencer binding */
+struct snd_seq_ump_ops {
+	void (*input_receive)(struct snd_ump_endpoint *ump,
+			      const u32 *data, int words);
+};
+
+struct snd_ump_block {
+	struct snd_ump_block_info info;
+	struct snd_ump_endpoint *ump;
+
+	void *private_data;
+	void (*private_free)(struct snd_ump_block *blk);
+
+	struct list_head list;
+};
+
+#define rawmidi_to_ump(rmidi)	container_of(rmidi, struct snd_ump_endpoint, core)
+
+int snd_ump_endpoint_new(struct snd_card *card, char *id, int device,
+			 int output, int input,
+			 struct snd_ump_endpoint **ump_ret);
+int snd_ump_block_new(struct snd_ump_endpoint *ump, unsigned int blk,
+		      unsigned int direction, unsigned int first_group,
+		      unsigned int num_groups, struct snd_ump_block **blk_ret);
+int snd_ump_receive(struct snd_ump_endpoint *ump, const u32 *buffer, int count);
+int snd_ump_transmit(struct snd_ump_endpoint *ump, u32 *buffer, int count);
+
+#if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
+int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump,
+				  char *id, int device);
+#else
+static inline int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump,
+						char *id, int device)
+{
+	return 0;
+}
+#endif
+
+/*
+ * Some definitions for UMP
+ */
+
+/* MIDI 2.0 Message Type */
+enum {
+	UMP_MSG_TYPE_UTILITY			= 0x00,
+	UMP_MSG_TYPE_SYSTEM			= 0x01,
+	UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE	= 0x02,
+	UMP_MSG_TYPE_DATA			= 0x03,
+	UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE	= 0x04,
+	UMP_MSG_TYPE_EXTENDED_DATA		= 0x05,
+};
+
+/* MIDI 2.0 SysEx / Data Status; same values for both 7-bit and 8-bit SysEx */
+enum {
+	UMP_SYSEX_STATUS_SINGLE			= 0,
+	UMP_SYSEX_STATUS_START			= 1,
+	UMP_SYSEX_STATUS_CONTINUE		= 2,
+	UMP_SYSEX_STATUS_END			= 3,
+};
+
+/*
+ * Helpers for retrieving / filling bits from UMP
+ */
+/* get the message type (4bit) from a UMP packet (header) */
+static inline unsigned char ump_message_type(u32 data)
+{
+	return data >> 28;
+}
+
+/* get the group number (0-based, 4bit) from a UMP packet (header) */
+static inline unsigned char ump_message_group(u32 data)
+{
+	return (data >> 24) & 0x0f;
+}
+
+/* get the MIDI status code (4bit) from a UMP packet (header) */
+static inline unsigned char ump_message_status_code(u32 data)
+{
+	return (data >> 20) & 0x0f;
+}
+
+/* get the MIDI channel number (0-based, 4bit) from a UMP packet (header) */
+static inline unsigned char ump_message_channel(u32 data)
+{
+	return (data >> 16) & 0x0f;
+}
+
+/* get the MIDI status + channel combo byte (8bit) from a UMP packet (header) */
+static inline unsigned char ump_message_status_channel(u32 data)
+{
+	return (data >> 16) & 0xff;
+}
+
+/* compose a UMP packet (header) from type, group and status values */
+static inline u32 ump_compose(unsigned char type, unsigned char group,
+			      unsigned char status, unsigned char channel)
+{
+	return ((u32)type << 28) | ((u32)group << 24) | ((u32)status << 20) |
+		((u32)channel << 16);
+}
+
+/* get SysEx message status (for both 7 and 8bits) from a UMP packet (header) */
+static inline unsigned char ump_sysex_message_status(u32 data)
+{
+	return (data >> 20) & 0xf;
+}
+
+/* get SysEx message length (for both 7 and 8bits) from a UMP packet (header) */
+static inline unsigned char ump_sysex_message_length(u32 data)
+{
+	return (data >> 16) & 0xf;
+}
+
+#endif /* __SOUND_UMP_H */
diff --git a/include/sound/ump_msg.h b/include/sound/ump_msg.h
new file mode 100644
index 000000000000..c76c39944a5f
--- /dev/null
+++ b/include/sound/ump_msg.h
@@ -0,0 +1,540 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Universal MIDI Packet (UMP): Message Definitions
+ */
+#ifndef __SOUND_UMP_MSG_H
+#define __SOUND_UMP_MSG_H
+
+/* MIDI 1.0 / 2.0 Status Code (4bit) */
+enum {
+	UMP_MSG_STATUS_PER_NOTE_RCC = 0x0,
+	UMP_MSG_STATUS_PER_NOTE_ACC = 0x1,
+	UMP_MSG_STATUS_RPN = 0x2,
+	UMP_MSG_STATUS_NRPN = 0x3,
+	UMP_MSG_STATUS_RELATIVE_RPN = 0x4,
+	UMP_MSG_STATUS_RELATIVE_NRPN = 0x5,
+	UMP_MSG_STATUS_PER_NOTE_PITCH_BEND = 0x6,
+	UMP_MSG_STATUS_NOTE_OFF = 0x8,
+	UMP_MSG_STATUS_NOTE_ON = 0x9,
+	UMP_MSG_STATUS_POLY_PRESSURE = 0xa,
+	UMP_MSG_STATUS_CC = 0xb,
+	UMP_MSG_STATUS_PROGRAM = 0xc,
+	UMP_MSG_STATUS_CHANNEL_PRESSURE = 0xd,
+	UMP_MSG_STATUS_PITCH_BEND = 0xe,
+	UMP_MSG_STATUS_PER_NOTE_MGMT = 0xf,
+};
+
+/* MIDI 1.0 Channel Control (7bit) */
+enum {
+	UMP_CC_BANK_SELECT = 0,
+	UMP_CC_MODULATION = 1,
+	UMP_CC_BREATH = 2,
+	UMP_CC_FOOT = 4,
+	UMP_CC_PORTAMENTO_TIME = 5,
+	UMP_CC_DATA = 6,
+	UMP_CC_VOLUME = 7,
+	UMP_CC_BALANCE = 8,
+	UMP_CC_PAN = 10,
+	UMP_CC_EXPRESSION = 11,
+	UMP_CC_EFFECT_CONTROL_1 = 12,
+	UMP_CC_EFFECT_CONTROL_2 = 13,
+	UMP_CC_GP_1 = 16,
+	UMP_CC_GP_2 = 17,
+	UMP_CC_GP_3 = 18,
+	UMP_CC_GP_4 = 19,
+	UMP_CC_BANK_SELECT_LSB = 32,
+	UMP_CC_MODULATION_LSB = 33,
+	UMP_CC_BREATH_LSB = 34,
+	UMP_CC_FOOT_LSB = 36,
+	UMP_CC_PORTAMENTO_TIME_LSB = 37,
+	UMP_CC_DATA_LSB = 38,
+	UMP_CC_VOLUME_LSB = 39,
+	UMP_CC_BALANCE_LSB = 40,
+	UMP_CC_PAN_LSB = 42,
+	UMP_CC_EXPRESSION_LSB = 43,
+	UMP_CC_EFFECT1_LSB = 44,
+	UMP_CC_EFFECT2_LSB = 45,
+	UMP_CC_GP_1_LSB = 48,
+	UMP_CC_GP_2_LSB = 49,
+	UMP_CC_GP_3_LSB = 50,
+	UMP_CC_GP_4_LSB = 51,
+	UMP_CC_SUSTAIN = 64,
+	UMP_CC_PORTAMENTO_SWITCH = 65,
+	UMP_CC_SOSTENUTO = 66,
+	UMP_CC_SOFT_PEDAL = 67,
+	UMP_CC_LEGATO = 68,
+	UMP_CC_HOLD_2 = 69,
+	UMP_CC_SOUND_CONTROLLER_1 = 70,
+	UMP_CC_SOUND_CONTROLLER_2 = 71,
+	UMP_CC_SOUND_CONTROLLER_3 = 72,
+	UMP_CC_SOUND_CONTROLLER_4 = 73,
+	UMP_CC_SOUND_CONTROLLER_5 = 74,
+	UMP_CC_SOUND_CONTROLLER_6 = 75,
+	UMP_CC_SOUND_CONTROLLER_7 = 76,
+	UMP_CC_SOUND_CONTROLLER_8 = 77,
+	UMP_CC_SOUND_CONTROLLER_9 = 78,
+	UMP_CC_SOUND_CONTROLLER_10 = 79,
+	UMP_CC_GP_5 = 80,
+	UMP_CC_GP_6 = 81,
+	UMP_CC_GP_7 = 82,
+	UMP_CC_GP_8 = 83,
+	UMP_CC_PORTAMENTO_CONTROL = 84,
+	UMP_CC_EFFECT_1 = 91,
+	UMP_CC_EFFECT_2 = 92,
+	UMP_CC_EFFECT_3 = 93,
+	UMP_CC_EFFECT_4 = 94,
+	UMP_CC_EFFECT_5 = 95,
+	UMP_CC_DATA_INC = 96,
+	UMP_CC_DATA_DEC = 97,
+	UMP_CC_NRPN_LSB = 98,
+	UMP_CC_NRPN_MSB = 99,
+	UMP_CC_RPN_LSB = 100,
+	UMP_CC_RPN_MSB = 101,
+	UMP_CC_ALL_SOUND_OFF = 120,
+	UMP_CC_RESET_ALL = 121,
+	UMP_CC_LOCAL_CONTROL = 122,
+	UMP_CC_ALL_NOTES_OFF = 123,
+	UMP_CC_OMNI_OFF = 124,
+	UMP_CC_OMNI_ON = 125,
+	UMP_CC_POLY_OFF = 126,
+	UMP_CC_POLY_ON = 127,
+};
+
+/* MIDI 1.0 / 2.0 System Messages (0xfx) */
+enum {
+	UMP_SYSTEM_STATUS_MIDI_TIME_CODE = 0xf1,
+	UMP_SYSTEM_STATUS_SONG_POSITION = 0xf2,
+	UMP_SYSTEM_STATUS_SONG_SELECT = 0xf3,
+	UMP_SYSTEM_STATUS_TUNE_REQUEST = 0xf6,
+	UMP_SYSTEM_STATUS_TIMING_CLOCK = 0xf8,
+	UMP_SYSTEM_STATUS_START = 0xfa,
+	UMP_SYSTEM_STATUS_CONTINUE = 0xfb,
+	UMP_SYSTEM_STATUS_STOP = 0xfc,
+	UMP_SYSTEM_STATUS_ACTIVE_SENSING = 0xfe,
+	UMP_SYSTEM_STATUS_RESET = 0xff,
+};
+
+/* MIDI 1.0 Realtime and SysEx status messages (0xfx) */
+enum {
+	UMP_MIDI1_MSG_REALTIME		= 0xf0,	/* mask */
+	UMP_MIDI1_MSG_SYSEX_START	= 0xf0,
+	UMP_MIDI1_MSG_SYSEX_END		= 0xf7,
+};
+
+/*
+ * UMP Message Definitions
+ */
+
+/* MIDI 1.0 Note Off / Note On (32bit) */
+struct snd_ump_midi1_msg_note {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 note:8;
+	u32 velocity:8;
+#else
+	u32 velocity:8;
+	u32 note:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+#endif
+} __packed;
+
+/* MIDI 1.0 Poly Pressure (32bit) */
+struct snd_ump_midi1_msg_paf {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 note:8;
+	u32 data:8;
+#else
+	u32 data:8;
+	u32 note:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+#endif
+} __packed;
+
+/* MIDI 1.0 Control Change (32bit) */
+struct snd_ump_midi1_msg_cc {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 index:8;
+	u32 data:8;
+#else
+	u32 data:8;
+	u32 index:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+#endif
+} __packed;
+
+/* MIDI 1.0 Program Change (32bit) */
+struct snd_ump_midi1_msg_program {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 program:8;
+	u32 reserved:8;
+#else
+#endif
+	u32 reserved:8;
+	u32 program:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+} __packed;
+
+/* MIDI 1.0 Channel Pressure (32bit) */
+struct snd_ump_midi1_msg_caf {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 data:8;
+	u32 reserved:8;
+#else
+	u32 reserved:8;
+	u32 data:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+#endif
+} __packed;
+
+/* MIDI 1.0 Pitch Bend (32bit) */
+struct snd_ump_midi1_msg_pitchbend {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 data_lsb:8;
+	u32 data_msb:8;
+#else
+	u32 data_msb:8;
+	u32 data_lsb:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+#endif
+} __packed;
+
+/* System Common and Real Time messages (32bit); no channel field */
+struct snd_ump_system_msg {
+#ifdef __BIG_ENDIAN_BITFIELD
+	u32 type:4;
+	u32 group:4;
+	u32 status:8;
+	u32 parm1:8;
+	u32 parm2:8;
+#else
+	u32 parm2:8;
+	u32 parm1:8;
+	u32 status:8;
+	u32 group:4;
+	u32 type:4;
+#endif
+} __packed;
+
+/* MIDI 1.0 UMP CVM (32bit) */
+union snd_ump_midi1_msg {
+	struct snd_ump_midi1_msg_note note;
+	struct snd_ump_midi1_msg_paf paf;
+	struct snd_ump_midi1_msg_cc cc;
+	struct snd_ump_midi1_msg_program pg;
+	struct snd_ump_midi1_msg_caf caf;
+	struct snd_ump_midi1_msg_pitchbend pb;
+	struct snd_ump_system_msg system;
+	u32 raw;
+};
+
+/* MIDI 2.0 Note Off / Note On (64bit) */
+struct snd_ump_midi2_msg_note {
+#ifdef __BIG_ENDIAN_BITFIELD
+	/* 0 */
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 note:8;
+	u32 attribute_type:8;
+	/* 1 */
+	u32 velocity:16;
+	u32 attribute_data:16;
+#else
+	/* 0 */
+	u32 attribute_type:8;
+	u32 note:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+	/* 1 */
+	u32 attribute_data:16;
+	u32 velocity:16;
+#endif
+} __packed;
+
+/* MIDI 2.0 Poly Pressure (64bit) */
+struct snd_ump_midi2_msg_paf {
+#ifdef __BIG_ENDIAN_BITFIELD
+	/* 0 */
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 note:8;
+	u32 reserved:8;
+	/* 1 */
+	u32 data;
+#else
+	/* 0 */
+	u32 reserved:8;
+	u32 note:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+	/* 1 */
+	u32 data;
+#endif
+} __packed;
+
+/* MIDI 2.0 Per-Note Controller (64bit) */
+struct snd_ump_midi2_msg_pernote_cc {
+#ifdef __BIG_ENDIAN_BITFIELD
+	/* 0 */
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 note:8;
+	u32 index:8;
+	/* 1 */
+	u32 data;
+#else
+	/* 0 */
+	u32 index:8;
+	u32 note:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+	/* 1 */
+	u32 data;
+#endif
+} __packed;
+
+/* MIDI 2.0 Per-Note Management (64bit) */
+struct snd_ump_midi2_msg_pernote_mgmt {
+#ifdef __BIG_ENDIAN_BITFIELD
+	/* 0 */
+	u32 type:4;
+	u32 group:4;
+	u32 status:4;
+	u32 channel:4;
+	u32 note:8;
+	u32 flags:8;
+	/* 1 */
+	u32 reserved;
+#else
+	/* 0 */
+	u32 flags:8;
+	u32 note:8;
+	u32 channel:4;
+	u32 status:4;
+	u32 group:4;
+	u32 type:4;
+	/* 1 */
+	u32 reserved;
+#endif
+} __packed;
+
+/* MIDI 2.0 Control Change (64bit) */
+struct snd_ump_midi2_msg_cc {
+#ifdef __BIG_ENDIAN_BITFIELD
+	/* 0 */
+	u32 type:4;