1/***********************license start***************
2 * Copyright (c) 2003-2010  Cavium Networks (support@cavium.com). All rights
3 * reserved.
4 *
5 *
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7 * modification, are permitted provided that the following conditions are
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12 *
13 *   * Redistributions in binary form must reproduce the above
14 *     copyright notice, this list of conditions and the following
15 *     disclaimer in the documentation and/or other materials provided
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23 * This Software, including technical data, may be subject to U.S. export  control
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27
28 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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37 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
38 ***********************license end**************************************/
39
40
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43
44
45
46/**
47 * @file
48 *
49 * Interface to RAID block. This is not available on all chips.
50 *
51 * <hr>$Revision: 49448 $<hr>
52 */
53#include "executive-config.h"
54#include "cvmx-config.h"
55#include "cvmx.h"
56#include "cvmx-cmd-queue.h"
57#include "cvmx-raid.h"
58
59#ifdef CVMX_ENABLE_PKO_FUNCTIONS
60
61/**
62 * Initialize the RAID block
63 *
64 * @param polynomial Coefficients for the RAID polynomial
65 *
66 * @return Zero on success, negative on failure
67 */
68int cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial)
69{
70    cvmx_cmd_queue_result_t result;
71    cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf;
72
73    cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64);
74
75    result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0,
76                                       CVMX_FPA_OUTPUT_BUFFER_POOL,
77                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE);
78    if (result != CVMX_CMD_QUEUE_SUCCESS)
79        return -1;
80
81    rad_reg_cmd_buf.u64 = 0;
82    rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128;
83    rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL;
84    rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8;
85    rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7;
86    cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64);
87    return 0;
88}
89
90
91/**
92 * Shutdown the RAID block. RAID must be idle when
93 * this function is called.
94 *
95 * @return Zero on success, negative on failure
96 */
97int cvmx_raid_shutdown(void)
98{
99    cvmx_rad_reg_ctl_t rad_reg_ctl;
100
101    if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID))
102    {
103        cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n");
104        return -1;
105    }
106
107    rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL);
108    rad_reg_ctl.s.reset = 1;
109    cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64);
110    cvmx_wait(100);
111
112    cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID);
113    cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0);
114    return 0;
115}
116
117
118/**
119 * Submit a command to the RAID block
120 *
121 * @param num_words Number of command words to submit
122 * @param words     Command words
123 *
124 * @return Zero on success, negative on failure
125 */
126int cvmx_raid_submit(int num_words, cvmx_raid_word_t words[])
127{
128    cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words);
129    if (result == CVMX_CMD_QUEUE_SUCCESS)
130        cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words);
131    return result;
132}
133
134#endif
135