cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sprd-mcdt.h (2780B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#ifndef __SPRD_MCDT_H
      4#define __SPRD_MCDT_H
      5
      6enum sprd_mcdt_channel_type {
      7	SPRD_MCDT_DAC_CHAN,
      8	SPRD_MCDT_ADC_CHAN,
      9	SPRD_MCDT_UNKNOWN_CHAN,
     10};
     11
     12enum sprd_mcdt_dma_chan {
     13	SPRD_MCDT_DMA_CH0,
     14	SPRD_MCDT_DMA_CH1,
     15	SPRD_MCDT_DMA_CH2,
     16	SPRD_MCDT_DMA_CH3,
     17	SPRD_MCDT_DMA_CH4,
     18};
     19
     20struct sprd_mcdt_chan_callback {
     21	void (*notify)(void *data);
     22	void *data;
     23};
     24
     25/**
     26 * struct sprd_mcdt_chan - this struct represents a single channel instance
     27 * @mcdt: the mcdt controller
     28 * @id: channel id
     29 * @fifo_phys: channel fifo physical address which is used for DMA transfer
     30 * @type: channel type
     31 * @cb: channel fifo interrupt's callback interface to notify the fifo events
     32 * @dma_enable: indicate if use DMA mode to transfer data
     33 * @int_enable: indicate if use interrupt mode to notify users to read or
     34 * write data manually
     35 * @list: used to link into the global list
     36 *
     37 * Note: users should not modify any members of this structure.
     38 */
     39struct sprd_mcdt_chan {
     40	struct sprd_mcdt_dev *mcdt;
     41	u8 id;
     42	unsigned long fifo_phys;
     43	enum sprd_mcdt_channel_type type;
     44	enum sprd_mcdt_dma_chan dma_chan;
     45	struct sprd_mcdt_chan_callback *cb;
     46	bool dma_enable;
     47	bool int_enable;
     48	struct list_head list;
     49};
     50
     51#if IS_ENABLED(CONFIG_SND_SOC_SPRD_MCDT)
     52struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
     53					      enum sprd_mcdt_channel_type type);
     54void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan);
     55
     56int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size);
     57int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size);
     58int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
     59			      struct sprd_mcdt_chan_callback *cb);
     60void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan);
     61
     62int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
     63			      enum sprd_mcdt_dma_chan dma_chan, u32 water_mark);
     64void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan);
     65
     66#else
     67
     68struct sprd_mcdt_chan *sprd_mcdt_request_chan(u8 channel,
     69					      enum sprd_mcdt_channel_type type)
     70{
     71	return NULL;
     72}
     73
     74void sprd_mcdt_free_chan(struct sprd_mcdt_chan *chan)
     75{ }
     76
     77int sprd_mcdt_chan_write(struct sprd_mcdt_chan *chan, char *tx_buf, u32 size)
     78{
     79	return -EINVAL;
     80}
     81
     82int sprd_mcdt_chan_read(struct sprd_mcdt_chan *chan, char *rx_buf, u32 size)
     83{
     84	return 0;
     85}
     86
     87int sprd_mcdt_chan_int_enable(struct sprd_mcdt_chan *chan, u32 water_mark,
     88			      struct sprd_mcdt_chan_callback *cb)
     89{
     90	return -EINVAL;
     91}
     92
     93void sprd_mcdt_chan_int_disable(struct sprd_mcdt_chan *chan)
     94{ }
     95
     96int sprd_mcdt_chan_dma_enable(struct sprd_mcdt_chan *chan,
     97			      enum sprd_mcdt_dma_chan dma_chan, u32 water_mark)
     98{
     99	return -EINVAL;
    100}
    101
    102void sprd_mcdt_chan_dma_disable(struct sprd_mcdt_chan *chan)
    103{ }
    104
    105#endif
    106
    107#endif /* __SPRD_MCDT_H */