Lines Matching full:buffer

64  * @brief Preallocate buffer in memory region associated with the specified device node
78  * @brief Prepare a DMA output buffer for the specified device
80  * Allocate an output buffer in memory region that given device can perform DMA transfers from.
82  * Writeback data cache lines associated with output buffer, if needed.
84  * @note Depending on provided user buffer parameters and SoC architecture,
88  *       to support transmitting and receiving data to the same buffer.
92  *          or @ref dmm_buffer_in_release is called on the same buffer
95  * @param region Memory region associated with device to prepare the buffer for.
96  * @param user_buffer CPU address (virtual if applicable) of the buffer containing data
98  * @param user_length Length of the buffer containing data to be processed by the given device.
99  * @param buffer_out Pointer to a bus address of a buffer containing the prepared DMA buffer.
102  * @retval -ENOMEM If output buffer could not be allocated.
109  * @brief Release the previously prepared DMA output buffer
111  * @param region Memory region associated with device to release the buffer for.
112  * @param buffer_out Bus address of the DMA output buffer previously prepared
121  * @brief Prepare a DMA input buffer for the specified device
123  * Allocate an input buffer in memory region that given device can perform DMA transfers to.
125  * @note Depending on provided user buffer parameters and SoC architecture,
130  *          is called on the same buffer or until this function returns with an error.
132  * @param region Memory region associated with device to prepare the buffer for.
133  * @param user_buffer CPU address (virtual if applicable) of the buffer to be filled with data
135  * @param user_length Length of the buffer to be filled with data from the given device.
136  * @param buffer_in Pointer to a bus address of a buffer containing the prepared DMA buffer.
139  * @retval -ENOMEM If input buffer could not be allocated.
145  * @brief Release the previously prepared DMA input buffer
147  * Invalidate data cache lines associated with input buffer, if needed.
150  * @param region Memory region associated with device to release the buffer for.
151  * @param user_buffer CPU address (virtual if applicable) of the buffer to be filled with data
153  * @param user_length Length of the buffer to be filled with data from the given device.
154  * @param buffer_in Bus address of the DMA input buffer previously prepared