/* * dice.h - a part of driver for Dice based devices * * Copyright (c) Clemens Ladisch * Copyright (c) 2014 Takashi Sakamoto * * Licensed under the terms of the GNU General Public License, version 2. */ #ifndef SOUND_DICE_H_INCLUDED #define SOUND_DICE_H_INCLUDED #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../amdtp-am824.h" #include "../iso-resources.h" #include "../lib.h" #include "dice-interface.h" /* * This module support maximum 2 pairs of tx/rx isochronous streams for * our convinience. * * In documents for ASICs called with a name of 'DICE': * - ASIC for DICE II: * - Maximum 2 tx and 4 rx are supported. * - A packet supports maximum 16 data channels. * - TCD2210/2210-E (so-called 'Dice Mini'): * - Maximum 2 tx and 2 rx are supported. * - A packet supports maximum 16 data channels. * - TCD2220/2220-E (so-called 'Dice Jr.') * - 2 tx and 2 rx are supported. * - A packet supports maximum 16 data channels. * - TCD3070-CH (so-called 'Dice III') * - Maximum 2 tx and 2 rx are supported. * - A packet supports maximum 32 data channels. * * For the above, MIDI conformant data channel is just on the first isochronous * stream. */ #define MAX_STREAMS 2 struct snd_dice { struct snd_card *card; struct fw_unit *unit; spinlock_t lock; struct mutex mutex; bool registered; struct delayed_work dwork; /* Offsets for sub-addresses */ unsigned int global_offset; unsigned int rx_offset; unsigned int tx_offset; unsigned int sync_offset; unsigned int rsrv_offset; unsigned int clock_caps; struct fw_address_handler notification_handler; int owner_generation; u32 notification_bits; /* For uapi */ int dev_lock_count; /* > 0 driver, < 0 userspace */ bool dev_lock_changed; wait_queue_head_t hwdep_wait; /* For streaming */ struct fw_iso_resources tx_resources[MAX_STREAMS]; struct fw_iso_resources rx_resources[MAX_STREAMS]; struct amdtp_stream tx_stream[MAX_STREAMS]; struct amdtp_stream rx_stream[MAX_STREAMS]; bool global_enabled; struct completion clock_accepted; unsigned int substreams_counter; bool force_two_pcms; }; enum snd_dice_addr_type { SND_DICE_ADDR_TYPE_PRIVATE, SND_DICE_ADDR_TYPE_GLOBAL, SND_DICE_ADDR_TYPE_TX, SND_DICE_ADDR_TYPE_RX, SND_DICE_ADDR_TYPE_SYNC, SND_DICE_ADDR_TYPE_RSRV, }; int snd_dice_transaction_write(struct snd_dice *dice, enum snd_dice_addr_type type, unsigned int offset, void *buf, unsigned int len); int snd_dice_transaction_read(struct snd_dice *dice, enum snd_dice_addr_type type, unsigned int offset, void *buf, unsigned int len); static inline int snd_dice_transaction_write_global(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_GLOBAL, offset, buf, len); } static inline int snd_dice_transaction_read_global(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_GLOBAL, offset, buf, len); } static inline int snd_dice_transaction_write_tx(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_TX, offset, buf, len); } static inline int snd_dice_transaction_read_tx(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_TX, offset, buf, len); } static inline int snd_dice_transaction_write_rx(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_RX, offset, buf, len); } static inline int snd_dice_transaction_read_rx(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_RX, offset, buf, len); } static inline int snd_dice_transaction_write_sync(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_SYNC, offset, buf, len); } static inline int snd_dice_transaction_read_sync(struct snd_dice *dice, unsigned int offset, void *buf, unsigned int len) { return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_SYNC, offset, buf, len); } int snd_dice_transaction_get_clock_source(struct snd_dice *dice, unsigned int *source); int snd_dice_transaction_get_rate(struct snd_dice *dice, unsigned int *rate); int snd_dice_transaction_set_enable(struct snd_dice *dice); void snd_dice_transaction_clear_enable(struct snd_dice *dice); int snd_dice_transaction_init(struct snd_dice *dice); int snd_dice_transaction_reinit(struct snd_dice *dice); void snd_dice_transaction_destroy(struct snd_dice *dice); #define SND_DICE_RATES_COUNT 7 extern const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT]; int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate); void snd_dice_stream_stop_duplex(struct snd_dice *dice); int snd_dice_stream_init_duplex(struct snd_dice *dice); void snd_dice_stream_destroy_duplex(struct snd_dice *dice); void snd_dice_stream_update_duplex(struct snd_dice *dice); int snd_dice_stream_lock_try(struct snd_dice *dice); void snd_dice_stream_lock_release(struct snd_dice *dice); int snd_dice_create_pcm(struct snd_dice *dice); int snd_dice_create_hwdep(struct snd_dice *dice); void snd_dice_create_proc(struct snd_dice *dice); int snd_dice_create_midi(struct snd_dice *dice); #endif 4b6b4e5d599c7289526eed96541a0654&id2=877a021e08ccb6434718c0cc781fdf943c884cc0'>diff)
HID: cp2112: fix sleep-while-atomic
A recent commit fixing DMA-buffers on stack added a shared transfer buffer protected by a spinlock. This is broken as the USB HID request callbacks can sleep. Fix this up by replacing the spinlock with a mutex. Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable") Cc: stable <stable@vger.kernel.org> # 4.9 Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'tools/objtool/special.c')