cvmx-raid.c revision 210284 
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38
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40
41
42
43
44/**
45 * @file
46 *
47 * Interface to RAID block. This is not available on all chips.
48 *
49 * <hr>$Revision: 41586 $<hr>
50 */
51#include "executive-config.h"
52#include "cvmx-config.h"
53#include "cvmx.h"
54#include "cvmx-cmd-queue.h"
55#include "cvmx-raid.h"
56
57#ifdef CVMX_ENABLE_PKO_FUNCTIONS
58
59/**
60 * Initialize the RAID block
61 *
62 * @param polynomial Coefficients for the RAID polynomial
63 *
64 * @return Zero on success, negative on failure
65 */
66int cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial)
67{
68    cvmx_cmd_queue_result_t result;
69    cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf;
70
71    cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64);
72
73    result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0,
74                                       CVMX_FPA_OUTPUT_BUFFER_POOL,
75                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE);
76    if (result != CVMX_CMD_QUEUE_SUCCESS)
77        return -1;
78
79    rad_reg_cmd_buf.u64 = 0;
80    rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128;
81    rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL;
82    rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8;
83    rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7;
84    cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64);
85    return 0;
86}
87
88
89/**
90 * Shutdown the RAID block. RAID must be idle when
91 * this function is called.
92 *
93 * @return Zero on success, negative on failure
94 */
95int cvmx_raid_shutdown(void)
96{
97    cvmx_rad_reg_ctl_t rad_reg_ctl;
98
99    if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID))
100    {
101        cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n");
102        return -1;
103    }
104
105    rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL);
106    rad_reg_ctl.s.reset = 1;
107    cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64);
108    cvmx_wait(100);
109
110    cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID);
111    cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0);
112    return 0;
113}
114
115
116/**
117 * Submit a command to the RAID block
118 *
119 * @param num_words Number of command words to submit
120 * @param words     Command words
121 *
122 * @return Zero on success, negative on failure
123 */
124int cvmx_raid_submit(int num_words, cvmx_raid_word_t words[])
125{
126    cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words);
127    if (result == CVMX_CMD_QUEUE_SUCCESS)
128        cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words);
129    return result;
130}
131
132#endif
133