277 lines
10 KiB
C
277 lines
10 KiB
C
/* Customer ID=11656; Build=0x5f626; Copyright (c) 2005-2014 by Cadence Design Systems, Inc. ALL RIGHTS RESERVED.
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* These coded instructions, statements, and computer programs are the
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* copyrighted works and confidential proprietary information of
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* Cadence Design Systems, Inc. They may not be modified, copied, reproduced,
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* distributed, or disclosed to third parties in any manner, medium, or form,
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* in whole or in part, without the prior written consent of Cadence Design
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* Systems Inc.
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*/
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#ifndef __UDMA_H__
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#define __UDMA_H__
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#include <stdint.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Size of the uDMA descriptor */
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#define UDMA_DESC_STRUCT_SIZE 32
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/* Request attribute is a bit vector passed to the udma functions - udma_copy,
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* udma_2d_copy, udma_add_descs.
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* Bit 0 : 1 - trigger an interrupt when done, else do nothing
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* Bit 1 : 0 - retry the failed request; abort after programmer specified
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* number of retries. Defaults to abort with no retries.
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* 1 - abort the failed request (after retries) and all pending requests
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*/
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#define UDMA_DONE_INTERRUPT 0x1
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#define UDMA_ERROR_ABORT 0x0
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#define UDMA_ERROR_ABORT_ALL 0x2
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/* Enum representing various udma error conditions, udma status, and
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* return values
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*/
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typedef enum {
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UDMA_OK = 0,
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UDMA_ERROR_QUEUE_FULL = 1,
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UDMA_ERROR_BAD_DESC = 2,
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UDMA_ERROR_DRAM_CROSSING = 3,
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UDMA_ERROR_PIF_ADDR_BUS = 4,
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UDMA_ERROR_PIF_DATA_BUS = 5,
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UDMA_REQ_PENDING = 6,
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UDMA_REQ_DONE = 7,
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UDMA_ERROR_BAD_REQUEST = 8,
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UDMA_ERROR_INVALID_ARG = 11,
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UDMA_ERROR_INIT = 12,
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UDMA_ERROR_INTERNAL = -1
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} udma_status_t;
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#ifndef __UDMA_INTERNAL_H__
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/* Opaque structure describing a uDMA descriptor */
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struct udma_desc_struct {
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char _[UDMA_DESC_STRUCT_SIZE];
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} __attribute__ ((aligned (UDMA_DESC_STRUCT_SIZE)));
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#endif
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typedef struct udma_desc_struct udma_desc_t;
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/* Initialize the udma control structure, the uDMA registers with
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* the descriptor queue addresses, and the uDMA sync and error interrupt
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* handler. This function needs to be invoked prior to using the uDMA.
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*
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* xmp_udma_sync_intr : Processor interrupt number to flag udma done
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* xmp_udma_error_intr : Processor interrupt number to flag udma error
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*
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* Returns UDMA_ERROR_INIT if there was an error during initialization else
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* returns UDMA_OK.
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*/
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extern udma_status_t
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udma_init(uint32_t xmp_udma_sync_intr, uint32_t xmp_udma_error_intr);
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/* Performs a copy of a linear block of size bytes from the src
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* to the dest address. If the call returns UDMA_OK, status is set to
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* UDMA_REQ_PENDING or UDMA_REQ_DONE. If there is a dma error, the error code,
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* which could be one of UDMA_ERROR_BAD_DESC, UDMA_ERROR_DRAM_CROSSING,
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* UDMA_ERROR_PIF_ADDR_BUS, UDMA_ERROR_PIF_DATA_BUS is returned in the status.
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* Status is set to UDMA_REQ_DONE if the dma completes normally.
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* On completion, the callback function is invoked with the callback_data
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* and status as parameters. Note, the callback is always invoked even if
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* there is a dma error.
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*
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* src : src address of the copy
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* dest : dest address of the copy
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* size : number of bytes to copy
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* callback_data : optional data to be passed to callback_func
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* callback_func : optional callback after copy is done
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* request_attr : attribute defining how to process this request
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* (see description of the request attribute in top of udma.h)
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* status : track status of the copy; this gets also passed
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* as the second argument to the callback_func
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*
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* Returns UDMA_ERROR_QUEUE_FULL if no more requests can be added, else
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* returns UDMA_OK.
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*/
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extern udma_status_t
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udma_copy(void *dest,
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void *src,
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size_t size,
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void *callback_data,
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void (*callback_func)(void *, udma_status_t *status),
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uint32_t request_attr,
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udma_status_t *status);
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/* Performs a copy of a 2D block of data from the src to the dest
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* address. If the call returns UDMA_OK, status is set to UDMA_REQ_PENDING or
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* UDMA_REQ_DONE. If there is a dma error, the error code,
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* which could be one of UDMA_ERROR_BAD_DESC, UDMA_ERROR_DRAM_CROSSING,
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* UDMA_ERROR_PIF_ADDR_BUS, UDMA_ERROR_PIF_DATA_BUS is returned in the status.
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* Status is set to UDMA_REQ_DONE if the dma completes normally.
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* On completion, the callback function is invoked with the callback_data
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* and status as parameters. Note, the callback is always invoked even if
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* there is a dma error.
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*
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* src : src address of the copy
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* dest : dest address of the copy
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* row_size : number of bytes per row to copy
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* num_rows : number of rows to copy
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* src_pitch : src pitch
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* dest_pitch : dest pitch
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* callback_data : optional data to be passed to callback_func
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* callback_func : optional callback after copy is done
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* request_attr : attribute defining how to process this request
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* (see description of the request attribute in top of udma.h)
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* status : track status of the copy; this gets also passed
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* as the second argument to the callback_func
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*
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* Returns UDMA_ERROR_QUEUE_FULL if no more requests can be added, else
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* returns UDMA_OK.
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*/
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extern udma_status_t
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udma_2d_copy(void *dest,
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void *src,
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size_t row_size,
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uint32_t num_rows,
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uint32_t src_pitch,
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uint32_t dest_pitch,
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void *callback_data,
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void (*callback_func)(void *, udma_status_t *status),
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uint32_t request_attr,
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udma_status_t *status);
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/* Process requests that are done. Any callbacks associated
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* with the completed requests gets invoked. If there are any errors,
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* the error request is (and any pending request based on the request attribute)
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* cancelled and the error code is returned in the status associated with
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* all such cancelled requests. Callbacks associated with the cancelled
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* requests are also invoked. If all requests terminate normally, the status
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* of the completed requests are set to UDMA_REQ_DONE.
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*
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* Returns void
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*/
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extern void
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udma_process_requests();
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/* Sets the udma max PIF block size
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*
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* max_block_size : max block size to be set
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*
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* Returns UDMA_ERROR_INVALID_ARG if block_size is > 3, else returns UDMA_OK
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*/
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udma_status_t
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udma_set_max_block_size(uint32_t block_size);
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/* Sets the udma max outstanding PIF requests
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*
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* max_outstanding : max outstanding PIF requests
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*
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* Returns UDMA_ERROR_INVALID_ARG if max_outstanding is not between 1 and 16
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* else returns UDMA_OK
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*/
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udma_status_t
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udma_set_max_outstanding(uint32_t max_outstanding);
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/* Initialize a uDMA descriptor using the copy parameters. The descriptor
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* is then queued separately using udma_add_desc
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*
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* src : src address of the copy
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* dest : dest address of the copy
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* row_size : number of bytes per row to copy
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* num_rows : number of rows to copy
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* src_pitch : src pitch
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* dest_pitch : dest pitch
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* notify_with_interrupt : If 1, interrupt when dma is done with this descriptor
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* if 0, do nothing, else undefined
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*
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* Returns void
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*/
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extern void
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udma_set_desc(void *src,
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void *dest,
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size_t row_size,
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uint32_t num_rows,
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uint32_t src_pitch,
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uint32_t dest_pitch,
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uint32_t notify_with_interrupt,
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udma_desc_t *desc);
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/* Add multiple uDMA descriptors to the descriptor queue. If the call returns
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* UDMA_OK, the status is set to UDMA_REQ_PENDING or UDMA_REQ_DONE.
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* If there is a dma error, the error code, which could be one of
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* UDMA_ERROR_BAD_DESC, UDMA_ERROR_DRAM_CROSSING, UDMA_ERROR_PIF_ADDR_BUS,
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* UDMA_ERROR_PIF_DATA_BUS is returned in the status. Status is set
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* to UDMA_REQ_DONE, if the dma completes normally.
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* On completion, the callback function is invoked with the callback_data
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* and status as parameters. Note, the callback is always invoked even if
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* there is a dma error.
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*
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* desc : descriptors to be added
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* num_desc : number of descriptors to be added
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* callback_data : optional data to be passed to callback_func
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* callback_func : optional callback after copy is done
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* request_attr : attribute defining how to process this request
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* (see description of the request attribute in top of udma.h)
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* Note, bit 0 (for enabling interrupt) is ignored in this call.
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* To interrupt on dma completion, set the
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* notify_with_interrupt parameter when creating descriptors
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* using udma_set_desc.
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* status : track status of the copy; this gets also passed
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* as the second argument to the callback_func
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*
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* Returns UDMA_ERROR_QUEUE_FULL if no more descriptors can be added,
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* UDMA_ERROR_INVALID_ARG if num_descs == 0, else return UDMA_OK
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*/
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udma_status_t
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udma_add_descs(udma_desc_t *descs,
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uint32_t num_descs,
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void *callback_data,
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void (*callback_func)(void *, udma_status_t *status),
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uint32_t request_attr,
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udma_status_t *status);
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/* Wait for udma copy request to complete. Could spin wait or goto waiti
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* based on the sleep_wait parameter. Once the request is done, the callback
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* associated with this request and any prior completed requests are handled.
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* Error code, if any, is returned in the status s, else s is set to
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* UDMA_REQ_DONE.
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*
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* s : status to wait for
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* sleep_wait : sleep wait if true, else spin waits
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*
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* Returns void
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*/
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extern void
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udma_wait_request(volatile udma_status_t *s, uint32_t sleep_wait);
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/* Inlined function to set the src, dest address of the descriptor
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*
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* src : src address of the uDMA
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* dest : dest address of the uDMA
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* desc : descriptor to be modified
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*
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* Returns void
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*/
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void static inline
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udma_set_desc_addrs(void *src, void *dest, udma_desc_t *desc) {
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uint32_t *d = (uint32_t *)desc;
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*d = (uintptr_t)src;
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*(d+1) = (uintptr_t)dest;
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}
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/* Sets the number of retries for a failed dma request
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*
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* max_retries : max number of retries
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*
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* Sets the max number of retries for a failed dma request. The default is 0,
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* i.e, no retries
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*/
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void
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udma_set_max_retries(uint32_t max_retries);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __UDMA_H__ */
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