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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright © 2006, Intel Corporation. */#ifndef _ASYNC_TX_H_#define _ASYNC_TX_H_#include <linux/dmaengine.h>#include <linux/spinlock.h>#include <linux/interrupt.h>
/* on architectures without dma-mapping capabilities we need to ensure * that the asynchronous path compiles away */#ifdef CONFIG_HAS_DMA#define __async_inline#else#define __async_inline __always_inline#endif
/** * dma_chan_ref - object used to manage dma channels received from the * dmaengine core. * @chan - the channel being tracked * @node - node for the channel to be placed on async_tx_master_list * @rcu - for list_del_rcu * @count - number of times this channel is listed in the pool * (for channels with multiple capabiities) */struct dma_chan_ref { struct dma_chan *chan; struct list_head node; struct rcu_head rcu; atomic_t count;};
/** * async_tx_flags - modifiers for the async_* calls * @ASYNC_TX_XOR_ZERO_DST: this flag must be used for xor operations where the * destination address is not a source. The asynchronous case handles this * implicitly, the synchronous case needs to zero the destination block. * @ASYNC_TX_XOR_DROP_DST: this flag must be used if the destination address is * also one of the source addresses. In the synchronous case the destination * address is an implied source, whereas the asynchronous case it must be listed * as a source. The destination address must be the first address in the source * array. * @ASYNC_TX_ACK: immediately ack the descriptor, precludes setting up a * dependency chain * @ASYNC_TX_FENCE: specify that the next operation in the dependency * chain uses this operation's result as an input * @ASYNC_TX_PQ_XOR_DST: do not overwrite the syndrome but XOR it with the * input data. Required for rmw case. */enum async_tx_flags { ASYNC_TX_XOR_ZERO_DST = (1 << 0), ASYNC_TX_XOR_DROP_DST = (1 << 1), ASYNC_TX_ACK = (1 << 2), ASYNC_TX_FENCE = (1 << 3), ASYNC_TX_PQ_XOR_DST = (1 << 4),};
/** * struct async_submit_ctl - async_tx submission/completion modifiers * @flags: submission modifiers * @depend_tx: parent dependency of the current operation being submitted * @cb_fn: callback routine to run at operation completion * @cb_param: parameter for the callback routine * @scribble: caller provided space for dma/page address conversions */struct async_submit_ctl { enum async_tx_flags flags; struct dma_async_tx_descriptor *depend_tx; dma_async_tx_callback cb_fn; void *cb_param; void *scribble;};
#if defined(CONFIG_DMA_ENGINE) && !defined(CONFIG_ASYNC_TX_CHANNEL_SWITCH)#define async_tx_issue_pending_all dma_issue_pending_all
/** * async_tx_issue_pending - send pending descriptor to the hardware channel * @tx: descriptor handle to retrieve hardware context * * Note: any dependent operations will have already been issued by * async_tx_channel_switch, or (in the case of no channel switch) will * be already pending on this channel. */static inline void async_tx_issue_pending(struct dma_async_tx_descriptor *tx){ if (likely(tx)) { struct dma_chan *chan = tx->chan; struct dma_device *dma = chan->device;
dma->device_issue_pending(chan); }}#ifdef CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL#include <asm/async_tx.h>#else#define async_tx_find_channel(dep, type, dst, dst_count, src, src_count, len) \ __async_tx_find_channel(dep, type)struct dma_chan *__async_tx_find_channel(struct async_submit_ctl *submit, enum dma_transaction_type tx_type);#endif /* CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL */#elsestatic inline void async_tx_issue_pending_all(void){ do { } while (0);}
static inline void async_tx_issue_pending(struct dma_async_tx_descriptor *tx){ do { } while (0);}
static inline struct dma_chan *async_tx_find_channel(struct async_submit_ctl *submit, enum dma_transaction_type tx_type, struct page **dst, int dst_count, struct page **src, int src_count, size_t len){ return NULL;}#endif
/** * async_tx_sync_epilog - actions to take if an operation is run synchronously * @cb_fn: function to call when the transaction completes * @cb_fn_param: parameter to pass to the callback routine */static inline voidasync_tx_sync_epilog(struct async_submit_ctl *submit){ if (submit->cb_fn) submit->cb_fn(submit->cb_param);}
typedef union { unsigned long addr; struct page *page; dma_addr_t dma;} addr_conv_t;
static inline voidinit_async_submit(struct async_submit_ctl *args, enum async_tx_flags flags, struct dma_async_tx_descriptor *tx, dma_async_tx_callback cb_fn, void *cb_param, addr_conv_t *scribble){ args->flags = flags; args->depend_tx = tx; args->cb_fn = cb_fn; args->cb_param = cb_param; args->scribble = scribble;}
void async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_xor(struct page *dest, struct page **src_list, unsigned int offset, int src_cnt, size_t len, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_xor_offs(struct page *dest, unsigned int offset, struct page **src_list, unsigned int *src_offset, int src_cnt, size_t len, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_xor_val_offs(struct page *dest, unsigned int offset, struct page **src_list, unsigned int *src_offset, int src_cnt, size_t len, enum sum_check_flags *result, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset, unsigned int src_offset, size_t len, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_trigger_callback(struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_gen_syndrome(struct page **blocks, unsigned int *offsets, int src_cnt, size_t len, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_syndrome_val(struct page **blocks, unsigned int *offsets, int src_cnt, size_t len, enum sum_check_flags *pqres, struct page *spare, unsigned int s_off, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_raid6_2data_recov(int src_num, size_t bytes, int faila, int failb, struct page **ptrs, unsigned int *offs, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *async_raid6_datap_recov(int src_num, size_t bytes, int faila, struct page **ptrs, unsigned int *offs, struct async_submit_ctl *submit);
void async_tx_quiesce(struct dma_async_tx_descriptor **tx);#endif /* _ASYNC_TX_H_ */