xref: /linux/drivers/edac/octeon_edac-pci.c (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
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  * Copyright (C) 2009 Wind River Systems,
8  *   written by Ralf Baechle <ralf@linux-mips.org>
9  */
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <linux/io.h>
14 #include <linux/edac.h>
15 
16 #include <asm/octeon/cvmx.h>
17 #include <asm/octeon/cvmx-npi-defs.h>
18 #include <asm/octeon/cvmx-pci-defs.h>
19 #include <asm/octeon/octeon.h>
20 
21 #include "edac_core.h"
22 #include "edac_module.h"
23 
24 static void octeon_pci_poll(struct edac_pci_ctl_info *pci)
25 {
26 	union cvmx_pci_cfg01 cfg01;
27 
28 	cfg01.u32 = octeon_npi_read32(CVMX_NPI_PCI_CFG01);
29 	if (cfg01.s.dpe) {		/* Detected parity error */
30 		edac_pci_handle_pe(pci, pci->ctl_name);
31 		cfg01.s.dpe = 1;		/* Reset  */
32 		octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
33 	}
34 	if (cfg01.s.sse) {
35 		edac_pci_handle_npe(pci, "Signaled System Error");
36 		cfg01.s.sse = 1;		/* Reset */
37 		octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
38 	}
39 	if (cfg01.s.rma) {
40 		edac_pci_handle_npe(pci, "Received Master Abort");
41 		cfg01.s.rma = 1;		/* Reset */
42 		octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
43 	}
44 	if (cfg01.s.rta) {
45 		edac_pci_handle_npe(pci, "Received Target Abort");
46 		cfg01.s.rta = 1;		/* Reset */
47 		octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
48 	}
49 	if (cfg01.s.sta) {
50 		edac_pci_handle_npe(pci, "Signaled Target Abort");
51 		cfg01.s.sta = 1;		/* Reset */
52 		octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
53 	}
54 	if (cfg01.s.mdpe) {
55 		edac_pci_handle_npe(pci, "Master Data Parity Error");
56 		cfg01.s.mdpe = 1;		/* Reset */
57 		octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
58 	}
59 }
60 
61 static int __devinit octeon_pci_probe(struct platform_device *pdev)
62 {
63 	struct edac_pci_ctl_info *pci;
64 	int res = 0;
65 
66 	pci = edac_pci_alloc_ctl_info(0, "octeon_pci_err");
67 	if (!pci)
68 		return -ENOMEM;
69 
70 	pci->dev = &pdev->dev;
71 	platform_set_drvdata(pdev, pci);
72 	pci->dev_name = dev_name(&pdev->dev);
73 
74 	pci->mod_name = "octeon-pci";
75 	pci->ctl_name = "octeon_pci_err";
76 	pci->edac_check = octeon_pci_poll;
77 
78 	if (edac_pci_add_device(pci, 0) > 0) {
79 		pr_err("%s: edac_pci_add_device() failed\n", __func__);
80 		goto err;
81 	}
82 
83 	return 0;
84 
85 err:
86 	edac_pci_free_ctl_info(pci);
87 
88 	return res;
89 }
90 
91 static int octeon_pci_remove(struct platform_device *pdev)
92 {
93 	struct edac_pci_ctl_info *pci = platform_get_drvdata(pdev);
94 
95 	edac_pci_del_device(&pdev->dev);
96 	edac_pci_free_ctl_info(pci);
97 
98 	return 0;
99 }
100 
101 static struct platform_driver octeon_pci_driver = {
102 	.probe = octeon_pci_probe,
103 	.remove = octeon_pci_remove,
104 	.driver = {
105 		   .name = "octeon_pci_edac",
106 	}
107 };
108 module_platform_driver(octeon_pci_driver);
109 
110 MODULE_LICENSE("GPL");
111 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
112