1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2012 Cavium, Inc.
7  *
8  * Copyright (C) 2009 Wind River Systems,
9  *   written by Ralf Baechle <ralf@linux-mips.org>
10  */
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/io.h>
15 #include <linux/edac.h>
16 
17 #include <asm/octeon/cvmx.h>
18 
19 #include "edac_module.h"
20 
21 #define EDAC_MOD_STR "octeon-l2c"
22 
octeon_l2c_poll_oct1(struct edac_device_ctl_info * l2c)23 static void octeon_l2c_poll_oct1(struct edac_device_ctl_info *l2c)
24 {
25 	union cvmx_l2t_err l2t_err, l2t_err_reset;
26 	union cvmx_l2d_err l2d_err, l2d_err_reset;
27 
28 	l2t_err_reset.u64 = 0;
29 	l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
30 	if (l2t_err.s.sec_err) {
31 		edac_device_handle_ce(l2c, 0, 0,
32 				      "Tag Single bit error (corrected)");
33 		l2t_err_reset.s.sec_err = 1;
34 	}
35 	if (l2t_err.s.ded_err) {
36 		edac_device_handle_ue(l2c, 0, 0,
37 				      "Tag Double bit error (detected)");
38 		l2t_err_reset.s.ded_err = 1;
39 	}
40 	if (l2t_err_reset.u64)
41 		cvmx_write_csr(CVMX_L2T_ERR, l2t_err_reset.u64);
42 
43 	l2d_err_reset.u64 = 0;
44 	l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR);
45 	if (l2d_err.s.sec_err) {
46 		edac_device_handle_ce(l2c, 0, 1,
47 				      "Data Single bit error (corrected)");
48 		l2d_err_reset.s.sec_err = 1;
49 	}
50 	if (l2d_err.s.ded_err) {
51 		edac_device_handle_ue(l2c, 0, 1,
52 				      "Data Double bit error (detected)");
53 		l2d_err_reset.s.ded_err = 1;
54 	}
55 	if (l2d_err_reset.u64)
56 		cvmx_write_csr(CVMX_L2D_ERR, l2d_err_reset.u64);
57 
58 }
59 
_octeon_l2c_poll_oct2(struct edac_device_ctl_info * l2c,int tad)60 static void _octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c, int tad)
61 {
62 	union cvmx_l2c_err_tdtx err_tdtx, err_tdtx_reset;
63 	union cvmx_l2c_err_ttgx err_ttgx, err_ttgx_reset;
64 	char buf1[64];
65 	char buf2[80];
66 
67 	err_tdtx_reset.u64 = 0;
68 	err_tdtx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TDTX(tad));
69 	if (err_tdtx.s.dbe || err_tdtx.s.sbe ||
70 	    err_tdtx.s.vdbe || err_tdtx.s.vsbe)
71 		snprintf(buf1, sizeof(buf1),
72 			 "type:%d, syn:0x%x, way:%d",
73 			 err_tdtx.s.type, err_tdtx.s.syn, err_tdtx.s.wayidx);
74 
75 	if (err_tdtx.s.dbe) {
76 		snprintf(buf2, sizeof(buf2),
77 			 "L2D Double bit error (detected):%s", buf1);
78 		err_tdtx_reset.s.dbe = 1;
79 		edac_device_handle_ue(l2c, tad, 1, buf2);
80 	}
81 	if (err_tdtx.s.sbe) {
82 		snprintf(buf2, sizeof(buf2),
83 			 "L2D Single bit error (corrected):%s", buf1);
84 		err_tdtx_reset.s.sbe = 1;
85 		edac_device_handle_ce(l2c, tad, 1, buf2);
86 	}
87 	if (err_tdtx.s.vdbe) {
88 		snprintf(buf2, sizeof(buf2),
89 			 "VBF Double bit error (detected):%s", buf1);
90 		err_tdtx_reset.s.vdbe = 1;
91 		edac_device_handle_ue(l2c, tad, 1, buf2);
92 	}
93 	if (err_tdtx.s.vsbe) {
94 		snprintf(buf2, sizeof(buf2),
95 			 "VBF Single bit error (corrected):%s", buf1);
96 		err_tdtx_reset.s.vsbe = 1;
97 		edac_device_handle_ce(l2c, tad, 1, buf2);
98 	}
99 	if (err_tdtx_reset.u64)
100 		cvmx_write_csr(CVMX_L2C_ERR_TDTX(tad), err_tdtx_reset.u64);
101 
102 	err_ttgx_reset.u64 = 0;
103 	err_ttgx.u64 = cvmx_read_csr(CVMX_L2C_ERR_TTGX(tad));
104 
105 	if (err_ttgx.s.dbe || err_ttgx.s.sbe)
106 		snprintf(buf1, sizeof(buf1),
107 			 "type:%d, syn:0x%x, way:%d",
108 			 err_ttgx.s.type, err_ttgx.s.syn, err_ttgx.s.wayidx);
109 
110 	if (err_ttgx.s.dbe) {
111 		snprintf(buf2, sizeof(buf2),
112 			 "Tag Double bit error (detected):%s", buf1);
113 		err_ttgx_reset.s.dbe = 1;
114 		edac_device_handle_ue(l2c, tad, 0, buf2);
115 	}
116 	if (err_ttgx.s.sbe) {
117 		snprintf(buf2, sizeof(buf2),
118 			 "Tag Single bit error (corrected):%s", buf1);
119 		err_ttgx_reset.s.sbe = 1;
120 		edac_device_handle_ce(l2c, tad, 0, buf2);
121 	}
122 	if (err_ttgx_reset.u64)
123 		cvmx_write_csr(CVMX_L2C_ERR_TTGX(tad), err_ttgx_reset.u64);
124 }
125 
octeon_l2c_poll_oct2(struct edac_device_ctl_info * l2c)126 static void octeon_l2c_poll_oct2(struct edac_device_ctl_info *l2c)
127 {
128 	int i;
129 	for (i = 0; i < l2c->nr_instances; i++)
130 		_octeon_l2c_poll_oct2(l2c, i);
131 }
132 
octeon_l2c_probe(struct platform_device * pdev)133 static int octeon_l2c_probe(struct platform_device *pdev)
134 {
135 	struct edac_device_ctl_info *l2c;
136 
137 	int num_tads = OCTEON_IS_MODEL(OCTEON_CN68XX) ? 4 : 1;
138 
139 	/* 'Tags' are block 0, 'Data' is block 1*/
140 	l2c = edac_device_alloc_ctl_info(0, "l2c", num_tads, "l2c", 2, 0,
141 					 NULL, 0, edac_device_alloc_index());
142 	if (!l2c)
143 		return -ENOMEM;
144 
145 	l2c->dev = &pdev->dev;
146 	platform_set_drvdata(pdev, l2c);
147 	l2c->dev_name = dev_name(&pdev->dev);
148 
149 	l2c->mod_name = "octeon-l2c";
150 	l2c->ctl_name = "octeon_l2c_err";
151 
152 
153 	if (OCTEON_IS_OCTEON1PLUS()) {
154 		union cvmx_l2t_err l2t_err;
155 		union cvmx_l2d_err l2d_err;
156 
157 		l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
158 		l2t_err.s.sec_intena = 0;	/* We poll */
159 		l2t_err.s.ded_intena = 0;
160 		cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64);
161 
162 		l2d_err.u64 = cvmx_read_csr(CVMX_L2D_ERR);
163 		l2d_err.s.sec_intena = 0;	/* We poll */
164 		l2d_err.s.ded_intena = 0;
165 		cvmx_write_csr(CVMX_L2T_ERR, l2d_err.u64);
166 
167 		l2c->edac_check = octeon_l2c_poll_oct1;
168 	} else {
169 		/* OCTEON II */
170 		l2c->edac_check = octeon_l2c_poll_oct2;
171 	}
172 
173 	if (edac_device_add_device(l2c) > 0) {
174 		pr_err("%s: edac_device_add_device() failed\n", __func__);
175 		goto err;
176 	}
177 
178 
179 	return 0;
180 
181 err:
182 	edac_device_free_ctl_info(l2c);
183 
184 	return -ENXIO;
185 }
186 
octeon_l2c_remove(struct platform_device * pdev)187 static int octeon_l2c_remove(struct platform_device *pdev)
188 {
189 	struct edac_device_ctl_info *l2c = platform_get_drvdata(pdev);
190 
191 	edac_device_del_device(&pdev->dev);
192 	edac_device_free_ctl_info(l2c);
193 
194 	return 0;
195 }
196 
197 static struct platform_driver octeon_l2c_driver = {
198 	.probe = octeon_l2c_probe,
199 	.remove = octeon_l2c_remove,
200 	.driver = {
201 		   .name = "octeon_l2c_edac",
202 	}
203 };
204 module_platform_driver(octeon_l2c_driver);
205 
206 MODULE_LICENSE("GPL");
207 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
208