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authorChristian Pointner <equinox@helsinki.at>2024-05-10 18:52:23 (GMT)
committerChristian Pointner <equinox@helsinki.at>2024-05-10 18:52:23 (GMT)
commita641800acf13b5fb1463d4280c3ee7fc267143fb (patch)
tree248b647a682f71d9eb90d14d24081368ea905a42 /snd-alpx/include/4.16/dmaengine.h
parentcc4badffe0e02d159c21eb90ea080a6a2f90cb4b (diff)
import whole driver package
Diffstat (limited to 'snd-alpx/include/4.16/dmaengine.h')
-rw-r--r--snd-alpx/include/4.16/dmaengine.h174
1 files changed, 0 insertions, 174 deletions
diff --git a/snd-alpx/include/4.16/dmaengine.h b/snd-alpx/include/4.16/dmaengine.h
deleted file mode 100644
index 501c0b0..0000000
--- a/snd-alpx/include/4.16/dmaengine.h
+++ /dev/null
@@ -1,174 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * The contents of this file are private to DMA engine drivers, and is not
- * part of the API to be used by DMA engine users.
- */
-#ifndef DMAENGINE_H
-#define DMAENGINE_H
-
-#include <linux/bug.h>
-#include <linux/dmaengine.h>
-
-/**
- * dma_cookie_init - initialize the cookies for a DMA channel
- * @chan: dma channel to initialize
- */
-static inline void dma_cookie_init(struct dma_chan *chan)
-{
- chan->cookie = DMA_MIN_COOKIE;
- chan->completed_cookie = DMA_MIN_COOKIE;
-}
-
-/**
- * dma_cookie_assign - assign a DMA engine cookie to the descriptor
- * @tx: descriptor needing cookie
- *
- * Assign a unique non-zero per-channel cookie to the descriptor.
- * Note: caller is expected to hold a lock to prevent concurrency.
- */
-static inline dma_cookie_t dma_cookie_assign(struct dma_async_tx_descriptor *tx)
-{
- struct dma_chan *chan = tx->chan;
- dma_cookie_t cookie;
-
- cookie = chan->cookie + 1;
- if (cookie < DMA_MIN_COOKIE)
- cookie = DMA_MIN_COOKIE;
- tx->cookie = chan->cookie = cookie;
-
- return cookie;
-}
-
-/**
- * dma_cookie_complete - complete a descriptor
- * @tx: descriptor to complete
- *
- * Mark this descriptor complete by updating the channels completed
- * cookie marker. Zero the descriptors cookie to prevent accidental
- * repeated completions.
- *
- * Note: caller is expected to hold a lock to prevent concurrency.
- */
-static inline void dma_cookie_complete(struct dma_async_tx_descriptor *tx)
-{
- BUG_ON(tx->cookie < DMA_MIN_COOKIE);
- tx->chan->completed_cookie = tx->cookie;
- tx->cookie = 0;
-}
-
-/**
- * dma_cookie_status - report cookie status
- * @chan: dma channel
- * @cookie: cookie we are interested in
- * @state: dma_tx_state structure to return last/used cookies
- *
- * Report the status of the cookie, filling in the state structure if
- * non-NULL. No locking is required.
- */
-static inline enum dma_status dma_cookie_status(struct dma_chan *chan,
- dma_cookie_t cookie, struct dma_tx_state *state)
-{
- dma_cookie_t used, complete;
-
- used = chan->cookie;
- complete = chan->completed_cookie;
- barrier();
- if (state) {
- state->last = complete;
- state->used = used;
- state->residue = 0;
- }
- return dma_async_is_complete(cookie, complete, used);
-}
-
-static inline void dma_set_residue(struct dma_tx_state *state, u32 residue)
-{
- if (state)
- state->residue = residue;
-}
-
-struct dmaengine_desc_callback {
- dma_async_tx_callback callback;
- dma_async_tx_callback_result callback_result;
- void *callback_param;
-};
-
-/**
- * dmaengine_desc_get_callback - get the passed in callback function
- * @tx: tx descriptor
- * @cb: temp struct to hold the callback info
- *
- * Fill the passed in cb struct with what's available in the passed in
- * tx descriptor struct
- * No locking is required.
- */
-static inline void
-dmaengine_desc_get_callback(struct dma_async_tx_descriptor *tx,
- struct dmaengine_desc_callback *cb)
-{
- cb->callback = tx->callback;
- cb->callback_result = tx->callback_result;
- cb->callback_param = tx->callback_param;
-}
-
-/**
- * dmaengine_desc_callback_invoke - call the callback function in cb struct
- * @cb: temp struct that is holding the callback info
- * @result: transaction result
- *
- * Call the callback function provided in the cb struct with the parameter
- * in the cb struct.
- * Locking is dependent on the driver.
- */
-static inline void
-dmaengine_desc_callback_invoke(struct dmaengine_desc_callback *cb,
- const struct dmaengine_result *result)
-{
- struct dmaengine_result dummy_result = {
- .result = DMA_TRANS_NOERROR,
- .residue = 0
- };
-
- if (cb->callback_result) {
- if (!result)
- result = &dummy_result;
- cb->callback_result(cb->callback_param, result);
- } else if (cb->callback) {
- cb->callback(cb->callback_param);
- }
-}
-
-/**
- * dmaengine_desc_get_callback_invoke - get the callback in tx descriptor and
- * then immediately call the callback.
- * @tx: dma async tx descriptor
- * @result: transaction result
- *
- * Call dmaengine_desc_get_callback() and dmaengine_desc_callback_invoke()
- * in a single function since no work is necessary in between for the driver.
- * Locking is dependent on the driver.
- */
-static inline void
-dmaengine_desc_get_callback_invoke(struct dma_async_tx_descriptor *tx,
- const struct dmaengine_result *result)
-{
- struct dmaengine_desc_callback cb;
-
- dmaengine_desc_get_callback(tx, &cb);
- dmaengine_desc_callback_invoke(&cb, result);
-}
-
-/**
- * dmaengine_desc_callback_valid - verify the callback is valid in cb
- * @cb: callback info struct
- *
- * Return a bool that verifies whether callback in cb is valid or not.
- * No locking is required.
- */
-static inline bool
-dmaengine_desc_callback_valid(struct dmaengine_desc_callback *cb)
-{
- return (cb->callback) ? true : false;
-}
-
-#endif