1 /***********************license start***************
2 * Copyright (c) 2003-2010 Cavium Inc. ([email protected]). All rights
3 * reserved.
4 *
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
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10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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
16 * with the distribution.
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22
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
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44
45
46 /**
47 * @file
48 *
49 * Interface to RAID block. This is not available on all chips.
50 *
51 * <hr>$Revision: 70030 $<hr>
52 */
53 #ifdef CVMX_BUILD_FOR_LINUX_KERNEL
54 #include <linux/module.h>
55 #include <asm/octeon/cvmx.h>
56 #include <asm/octeon/cvmx-config.h>
57 #include <asm/octeon/cvmx-cmd-queue.h>
58 #include <asm/octeon/cvmx-raid.h>
59 #else
60 #include "executive-config.h"
61 #include "cvmx-config.h"
62 #include "cvmx.h"
63 #include "cvmx-cmd-queue.h"
64 #include "cvmx-raid.h"
65 #endif
66
67 #ifdef CVMX_ENABLE_PKO_FUNCTIONS
68
69 /**
70 * Initialize the RAID block
71 *
72 * @param polynomial Coefficients for the RAID polynomial
73 *
74 * @return Zero on success, negative on failure
75 */
cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial)76 int cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial)
77 {
78 cvmx_cmd_queue_result_t result;
79 cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf;
80
81 cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64);
82
83 result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0,
84 CVMX_FPA_OUTPUT_BUFFER_POOL,
85 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE);
86 if (result != CVMX_CMD_QUEUE_SUCCESS)
87 return -1;
88
89 rad_reg_cmd_buf.u64 = 0;
90 rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128;
91 rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL;
92 rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8;
93 rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7;
94 cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64);
95 return 0;
96 }
97 #ifdef CVMX_BUILD_FOR_LINUX_KERNEL
98 EXPORT_SYMBOL(cvmx_raid_initialize);
99 #endif
100
101 /**
102 * Shutdown the RAID block. RAID must be idle when
103 * this function is called.
104 *
105 * @return Zero on success, negative on failure
106 */
cvmx_raid_shutdown(void)107 int cvmx_raid_shutdown(void)
108 {
109 cvmx_rad_reg_ctl_t rad_reg_ctl;
110
111 if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID))
112 {
113 cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n");
114 return -1;
115 }
116
117 rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL);
118 rad_reg_ctl.s.reset = 1;
119 cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64);
120 cvmx_wait(100);
121
122 cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID);
123 cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0);
124 return 0;
125 }
126 #ifdef CVMX_BUILD_FOR_LINUX_KERNEL
127 EXPORT_SYMBOL(cvmx_raid_shutdown);
128 #endif
129
130 /**
131 * Submit a command to the RAID block
132 *
133 * @param num_words Number of command words to submit
134 * @param words Command words
135 *
136 * @return Zero on success, negative on failure
137 */
cvmx_raid_submit(int num_words,cvmx_raid_word_t words[])138 int cvmx_raid_submit(int num_words, cvmx_raid_word_t words[])
139 {
140 cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words);
141 if (result == CVMX_CMD_QUEUE_SUCCESS)
142 cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words);
143 return result;
144 }
145 #ifdef CVMX_BUILD_FOR_LINUX_KERNEL
146 EXPORT_SYMBOL(cvmx_raid_submit);
147 #endif
148 #endif
149