snd_ac97_read – read a value from the given register Synopsis unsigned short snd_ac97_read(struct snd_ac97 *ac97, unsigned short reg); Arguments ac97 the ac97 instance reg the register to read Description Reads a value from the given register. This will invoke the read callback directly after the register check. Return The read value. Copyright
snd_ac97_pcm_open – opens the given AC97 pcm Synopsis int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate, enum ac97_pcm_cfg cfg, unsigned short slots); Arguments pcm the ac97 pcm instance rate rate in Hz, if codec does not support VRA, this value must be 48000Hz cfg output stream characteristics slots a subset of allocated slots (snd_ac97_pcm_assign) for this…
snd_ac97_pcm_double_rate_rules – set double rate constraints Synopsis int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime); Arguments runtime the runtime of the ac97 front playback pcm Description Installs the hardware constraint rules to prevent using double rates and more than two channels at the same time. Return Zero if successful, or a negative error code on failure. Copyright
snd_ac97_pcm_close – closes the given AC97 pcm Synopsis int snd_ac97_pcm_close(struct ac97_pcm *pcm); Arguments pcm the ac97 pcm instance Description It frees the locked AC97 slots. Return Zero. Copyright
snd_ac97_pcm_assign – assign AC97 slots to given PCM streams Synopsis int snd_ac97_pcm_assign(struct snd_ac97_bus *bus, unsigned short pcms_count, const struct ac97_pcm *pcms); Arguments bus the ac97 bus instance pcms_count count of PCMs to be assigned pcms PCMs to be assigned Description It assigns available AC97 slots for given PCMs. If none or only some slots are…
snd_ac97_mixer – create an Codec97 component Synopsis int snd_ac97_mixer(struct snd_ac97_bus *bus, struct snd_ac97_template *template, struct snd_ac97 **rac97); Arguments bus the AC97 bus which codec is attached to template the template of ac97, including index, callbacks and the private data. rac97 the pointer to store the new ac97 instance. Description Creates an Codec97 component. An struct…
snd_ac97_get_short_name – retrieve codec name Synopsis const char *snd_ac97_get_short_name(struct snd_ac97 *ac97); Arguments ac97 the codec instance Return The short identifying name of the codec. Copyright
snd_ac97_bus – create an AC97 bus component Synopsis int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops, void *private_data, struct snd_ac97_bus **rbus); Arguments card the card instance num the bus number ops the bus callbacks table private_data private data pointer for the new instance rbus the pointer to store the new AC97 bus instance. Description…
snd_BUG_ON – debugging check macro Synopsis snd_BUG_ON(cond); Arguments cond condition to evaluate Description Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set, otherwise just evaluates the conditional and returns the value. Copyright
snd_BUG – give a BUG warning message and stack trace Synopsis snd_BUG(void); Arguments None Description Calls WARN if CONFIG_SND_DEBUG is set. Ignored when CONFIG_SND_DEBUG is not set. Copyright
sleeping_thread_to_gdb_regs – Convert ptrace regs to GDB regs Synopsis void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p); Arguments gdb_regs A pointer to hold the registers in the order GDB wants. p The struct task_struct of the desired process. Description Convert the register values of the sleeping process in p to the format that GDB expects. This…
skwq_has_sleeper – check if there are any waiting processes Synopsis bool skwq_has_sleeper(struct socket_wq * wq); Arguments wq struct socket_wq Description Returns true if socket_wq has waiting processes The purpose of the skwq_has_sleeper and sock_poll_wait is to wrap the memory barrier call. They were added due to the race found within the tcp code. Consider following tcp code…
skip_spaces – Removes leading whitespace from str. Synopsis char *skip_spaces(const char *str); Arguments str The string to be stripped. Description Returns a pointer to the first non-whitespace character in str. Copyright
skcipher_request_set_tfm – update cipher handle reference in request Synopsis void skcipher_request_set_tfm(struct skcipher_request *req, struct crypto_skcipher *tfm); Arguments req request handle to be modified tfm cipher handle that shall be added to the request handle Description Allow the caller to replace the existing skcipher handle in the request data structure with a different one. Authors Stephan…
skcipher_request_set_crypt – set data buffers Synopsis void skcipher_request_set_crypt(struct skcipher_request *req, struct scatterlist *src, struct scatterlist *dst, unsigned int cryptlen, void *iv); Arguments req request handle src source scatter / gather list dst destination scatter / gather list cryptlen number of bytes to process from src iv IV for the cipher operation which must comply with…
skcipher_request_set_callback – set asynchronous callback function Synopsis void skcipher_request_set_callback(struct skcipher_request *req, u32 flags, crypto_completion_t compl, void *data); Arguments req request handle flags specify zero or an ORing of the flags CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and increase the wait queue beyond the initial maximum size; CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep compl callback…
skcipher_request_free – zeroize and free request data structure Synopsis void skcipher_request_free(struct skcipher_request *req); Arguments req request data structure cipher handle to be freed Authors Stephan Mueller <smueller [at] chronox.de> Author. Marek Vasut <marek [at] denx.de> Author. Copyright
skcipher_request_alloc – allocate request data structure Synopsis struct skcipher_request *skcipher_request_alloc(struct crypto_skcipher *tfm, gfp_t gfp); Arguments tfm cipher handle to be registered with the request gfp memory allocation flag that is handed to kmalloc by the API call. Description Allocate the request data structure that must be used with the skcipher encrypt and decrypt API calls….
skb_zerocopy – Zero copy skb to skb Synopsis int skb_zerocopy(struct sk_buff *to, struct sk_buff *from, int len, int hlen); Arguments to destination buffer from source buffer len number of bytes to copy from source buffer hlen size of linear headroom in destination buffer Description Copies up to `len` bytes from `from` to `to` by creating…
skb_unshare – make a copy of a shared buffer Synopsis struct sk_buff *skb_unshare(struct sk_buff *skb, gfp_t pri); Arguments skb buffer to check pri priority for memory allocation Description If the socket buffer is a clone then this function creates a new copy of the data, drops a reference count on the old copy and returns…