edac_device.c revision 52490c8d07680a7ecc3c1a70a16841455d37e96a
1e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 2e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 3e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device.c 4e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * (C) 2007 www.douglaskthompson.com 5e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 6e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * This file may be distributed under the terms of the 7e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * GNU General Public License. 8e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 9e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Written by Doug Thompson <norsk5@xmission.com> 10e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 11e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device API implementation 12e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 19 Jan 2007 13e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 14e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 15e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/module.h> 16e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/types.h> 17e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/smp.h> 18e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/init.h> 19e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/sysctl.h> 20e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/highmem.h> 21e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/timer.h> 22e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/slab.h> 2352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson#include <linux/jiffies.h> 24e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/spinlock.h> 25e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/list.h> 26e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/sysdev.h> 27e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/ctype.h> 28e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <linux/workqueue.h> 29e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <asm/uaccess.h> 30e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include <asm/page.h> 31e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 32e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include "edac_core.h" 33e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#include "edac_module.h" 34e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 3552490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson/* lock to memory controller's control array 'edac_device_list' */ 36e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstatic DECLARE_MUTEX(device_ctls_mutex); 37e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstatic struct list_head edac_device_list = LIST_HEAD_INIT(edac_device_list); 38e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 39e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#ifdef CONFIG_EDAC_DEBUG 40e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstatic void edac_device_dump_device(struct edac_device_ctl_info *edac_dev) 41e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 42079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson debugf3("\tedac_dev = %p dev_idx=%d \n", edac_dev, edac_dev->dev_idx); 43e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf4("\tedac_dev->edac_check = %p\n", edac_dev->edac_check); 44e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf3("\tdev = %p\n", edac_dev->dev); 45e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf3("\tmod_name:ctl_name = %s:%s\n", 46e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->mod_name, edac_dev->ctl_name); 47e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf3("\tpvt_info = %p\n\n", edac_dev->pvt_info); 48e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 49079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson#endif /* CONFIG_EDAC_DEBUG */ 50e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 51e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 5252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * edac_device_alloc_ctl_info() 5352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * Allocate a new edac device control info structure 5452490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 5552490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * The control structure is allocated in complete chunk 5652490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * from the OS. It is in turn sub allocated to the 5752490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * various objects that compose the struture 5852490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 5952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * The structure has a 'nr_instance' array within itself. 6052490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * Each instance represents a major component 6152490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * Example: L1 cache and L2 cache are 2 instance components 6252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 6352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * Within each instance is an array of 'nr_blocks' blockoffsets 64e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 65e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstruct edac_device_ctl_info *edac_device_alloc_ctl_info( 66e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson unsigned sz_private, 6752490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson char *edac_device_name, unsigned nr_instances, 6852490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson char *edac_block_name, unsigned nr_blocks, 6952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson unsigned offset_value, /* zero, 1, or other based offset */ 7052490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson struct edac_attrib_spec *attrib_spec, unsigned nr_attribs) 71e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 72e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_ctl_info *dev_ctl; 73e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_instance *dev_inst, *inst; 74e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_block *dev_blk, *blk_p, *blk; 75e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_attrib *dev_attrib, *attrib_p, *attrib; 76e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson unsigned total_size; 77e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson unsigned count; 78e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson unsigned instance, block, attr; 79e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson void *pvt; 80e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 81e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf1("%s() instances=%d blocks=%d\n", 82079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson __func__, nr_instances, nr_blocks); 83e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 84e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Figure out the offsets of the various items from the start of an 85e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * ctl_info structure. We want the alignment of each item 86e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * to be at least as stringent as what the compiler would 87e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * provide if we could simply hardcode everything into a single struct. 88e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 8952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson dev_ctl = (struct edac_device_ctl_info *)NULL; 90e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 91e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Calc the 'end' offset past the ctl_info structure */ 92e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_inst = (struct edac_device_instance *) 93052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_align_ptr(&dev_ctl[1], sizeof(*dev_inst)); 94e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 95e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Calc the 'end' offset past the instance array */ 96e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_blk = (struct edac_device_block *) 97052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk)); 98e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 99e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Calc the 'end' offset past the dev_blk array */ 100e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson count = nr_instances * nr_blocks; 101e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_attrib = (struct edac_attrib *) 102052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib)); 103e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 104e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Check for case of NO attributes specified */ 105e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (nr_attribs > 0) 106e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson count *= nr_attribs; 107e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 108e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Calc the 'end' offset past the attributes array */ 109079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson pvt = edac_align_ptr(&dev_attrib[count], sz_private); 110079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson total_size = ((unsigned long)pvt) + sz_private; 111e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 112e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Allocate the amount of memory for the set of control structures */ 11352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson dev_ctl = kzalloc(total_size, GFP_KERNEL); 11452490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson if (dev_ctl == NULL) 115e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return NULL; 116e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 117e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Adjust pointers so they point within the memory we just allocated 118e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * rather than an imaginary chunk of memory located at address 0. 119e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 120e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_inst = (struct edac_device_instance *) 121052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (((char *)dev_ctl) + ((unsigned long)dev_inst)); 122e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_blk = (struct edac_device_block *) 123052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (((char *)dev_ctl) + ((unsigned long)dev_blk)); 124e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_attrib = (struct edac_attrib *) 125052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (((char *)dev_ctl) + ((unsigned long)dev_attrib)); 126079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL; 127e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 128e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_ctl->nr_instances = nr_instances; 129e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_ctl->instances = dev_inst; 130e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_ctl->pvt_info = pvt; 131e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 13252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson /* Name of this edac device */ 13352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name); 134e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 135e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Initialize every Instance */ 136e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson for (instance = 0; instance < nr_instances; instance++) { 137e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson inst = &dev_inst[instance]; 138e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson inst->ctl = dev_ctl; 139e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson inst->nr_blocks = nr_blocks; 140e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson blk_p = &dev_blk[instance * nr_blocks]; 141e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson inst->blocks = blk_p; 142e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 143e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* name of this instance */ 144e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson snprintf(inst->name, sizeof(inst->name), 145079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson "%s%u", edac_device_name, instance); 146e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 147e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Initialize every block in each instance */ 148079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson for (block = 0; block < nr_blocks; block++) { 149e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson blk = &blk_p[block]; 150e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson blk->instance = inst; 151e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson blk->nr_attribs = nr_attribs; 152e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson attrib_p = &dev_attrib[block * nr_attribs]; 153e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson blk->attribs = attrib_p; 154e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson snprintf(blk->name, sizeof(blk->name), 155d391a7b8147d12b0e5141fb65829856fb0c289dcDouglas Thompson "%s%d", edac_block_name, block+offset_value); 156e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 157e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf1("%s() instance=%d block=%d name=%s\n", 158079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson __func__, instance, block, blk->name); 159e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 160e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (attrib_spec != NULL) { 161e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* when there is an attrib_spec passed int then 162e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Initialize every attrib of each block 163e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 164e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson for (attr = 0; attr < nr_attribs; attr++) { 165e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson attrib = &attrib_p[attr]; 166e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson attrib->block = blk; 167e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 168e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Link each attribute to the caller's 169e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * spec entry, for name and type 170079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson */ 171e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson attrib->spec = &attrib_spec[attr]; 172e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 173e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 174e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 175e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 176e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 177e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Mark this instance as merely ALLOCATED */ 178e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson dev_ctl->op_state = OP_ALLOC; 179e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 180e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return dev_ctl; 181e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 182e27e3dac651771fe3250f6305dee277bce29fc5dDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info); 183e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 184e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 185e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_free_ctl_info() 186e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * frees the memory allocated by the edac_device_alloc_ctl_info() 187e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * function 188e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 189079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonvoid edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info) 190079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson{ 191e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson kfree(ctl_info); 192e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 193079708b9173595bf74b31b14c36e946359ae6c7eDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_free_ctl_info); 194e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 195e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 196e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * find_edac_device_by_dev 197e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * scans the edac_device list for a specific 'struct device *' 19852490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 19952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * lock to be held prior to call: device_ctls_mutex 20052490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 20152490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * Return: 20252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * pointer to control structure managing 'dev' 20352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * NULL if not found on list 204e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 205079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev) 206e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 207e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_ctl_info *edac_dev; 208e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct list_head *item; 209e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 210e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf3("%s()\n", __func__); 211e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 212e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson list_for_each(item, &edac_device_list) { 213e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev = list_entry(item, struct edac_device_ctl_info, link); 214e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 215e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_dev->dev == dev) 216e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return edac_dev; 217e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 218e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 219e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return NULL; 220e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 221e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 222e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 223e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * add_edac_dev_to_global_list 224e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Before calling this function, caller must 225e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * assign a unique value to edac_dev->dev_idx. 22652490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 22752490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * lock to be held prior to call: device_ctls_mutex 22852490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 229e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Return: 230e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 0 on success 231e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 1 on failure. 232e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 233079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev) 234e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 235e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct list_head *item, *insert_before; 236e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_ctl_info *rover; 237e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 238e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson insert_before = &edac_device_list; 239e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 240e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Determine if already on the list */ 24152490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson rover = find_edac_device_by_dev(edac_dev->dev); 24252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson if (unlikely(rover != NULL)) 243e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson goto fail0; 244e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 245e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Insert in ascending order by 'dev_idx', so find position */ 246e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson list_for_each(item, &edac_device_list) { 247e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson rover = list_entry(item, struct edac_device_ctl_info, link); 248e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 249e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (rover->dev_idx >= edac_dev->dev_idx) { 250e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (unlikely(rover->dev_idx == edac_dev->dev_idx)) 251e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson goto fail1; 252e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 253e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson insert_before = item; 254e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson break; 255e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 256e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 257e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 258e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson list_add_tail_rcu(&edac_dev->link, insert_before); 259e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return 0; 260e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 261052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 262e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_printk(KERN_WARNING, EDAC_MC, 263052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "%s (%s) %s %s already assigned %d\n", 264052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson rover->dev->bus_id, dev_name(rover), 265052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson rover->mod_name, rover->ctl_name, rover->dev_idx); 266e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return 1; 267e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 268052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 269e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_printk(KERN_WARNING, EDAC_MC, 270052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "bug in low-level driver: attempt to assign\n" 271052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson " duplicate dev_idx %d in %s()\n", rover->dev_idx, 272052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson __func__); 273e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return 1; 274e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 275e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 276e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 277e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * complete_edac_device_list_del 27852490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 27952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * callback function when reference count is zero 280e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 281e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstatic void complete_edac_device_list_del(struct rcu_head *head) 282e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 283e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_ctl_info *edac_dev; 284e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 285e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev = container_of(head, struct edac_device_ctl_info, rcu); 286e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson INIT_LIST_HEAD(&edac_dev->link); 287e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson complete(&edac_dev->complete); 288e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 289e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 290e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 291e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * del_edac_device_from_global_list 29252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * 29352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * remove the RCU, setup for a callback call, then wait for the 29452490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson * callback to occur 295e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 296079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic void del_edac_device_from_global_list(struct edac_device_ctl_info 297052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson *edac_device) 298e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 299e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson list_del_rcu(&edac_device->link); 300e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson init_completion(&edac_device->complete); 301e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson call_rcu(&edac_device->rcu, complete_edac_device_list_del); 302e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson wait_for_completion(&edac_device->complete); 303e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 304e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 305e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/** 306e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_find 307e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Search for a edac_device_ctl_info structure whose index is 'idx'. 308e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 309e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * If found, return a pointer to the structure. 310e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Else return NULL. 311e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 312e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Caller must hold device_ctls_mutex. 313e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 314079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct edac_device_ctl_info *edac_device_find(int idx) 315e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 316e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct list_head *item; 317e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_ctl_info *edac_dev; 318e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 319e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Iterate over list, looking for exact match of ID */ 320e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson list_for_each(item, &edac_device_list) { 321e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev = list_entry(item, struct edac_device_ctl_info, link); 322e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 323e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_dev->dev_idx >= idx) { 324e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_dev->dev_idx == idx) 325e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return edac_dev; 326e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 327e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* not on list, so terminate early */ 328e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson break; 329e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 330e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 331e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 332e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return NULL; 333e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 33452490c8d07680a7ecc3c1a70a16841455d37e96aDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_find); 335e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 336e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 33781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_device_workq_function 338e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * performs the operation scheduled by a workq request 339e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 34081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic void edac_device_workq_function(struct work_struct *work_req) 341e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 342079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson struct delayed_work *d_work = (struct delayed_work *)work_req; 343079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work); 344e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 345e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson //debugf0("%s() here and running\n", __func__); 34652490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson down(&device_ctls_mutex); 347e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 348e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Only poll controllers that are running polled and have a check */ 349e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if ((edac_dev->op_state == OP_RUNNING_POLL) && 350052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (edac_dev->edac_check != NULL)) { 351052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->edac_check(edac_dev); 352e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 353e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 35452490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson up(&device_ctls_mutex); 355e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 356e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Reschedule */ 357079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay); 358e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 359e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 360e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 36181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_device_workq_setup 362e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * initialize a workq item for this edac_device instance 363e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * passing in the new delay period in msec 364e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 36581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangvoid edac_device_workq_setup(struct edac_device_ctl_info *edac_dev, 366052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned msec) 367e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 368e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf0("%s()\n", __func__); 369e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 370e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->poll_msec = msec; 37152490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson edac_dev->delay = msecs_to_jiffies(msec); /* Calc delay jiffies */ 372e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 37381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function); 37481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay); 375e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 376e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 377e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 37881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_device_workq_teardown 379e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * stop the workq processing on this edac_dev 380e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 38181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangvoid edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev) 382e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 383e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson int status; 384e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 385e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson status = cancel_delayed_work(&edac_dev->work); 386e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (status == 0) { 387e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* workq instance might be running, wait for it */ 388e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson flush_workqueue(edac_workqueue); 389e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 390e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 391e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 392e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 393e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_reset_delay_period 394e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 395e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 396079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonvoid edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev, 397052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned long value) 398e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 39952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson down(&device_ctls_mutex); 400e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 401e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* cancel the current workq request */ 40281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_device_workq_teardown(edac_dev); 403e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 404e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* restart the workq request, with new delay value */ 40581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_device_workq_setup(edac_dev, value); 406e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 40752490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson up(&device_ctls_mutex); 408e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 409e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 410e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/** 411e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_add_device: Insert the 'edac_dev' structure into the 412e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device global list and create sysfs entries associated with 413e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device structure. 414e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * @edac_device: pointer to the edac_device structure to be added to the list 415e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * @edac_idx: A unique numeric identifier to be assigned to the 416e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 'edac_device' structure. 417e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 418e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Return: 419e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 0 Success 420e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * !0 Failure 421e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 422e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonint edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx) 423e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 424e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf0("%s()\n", __func__); 425e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 426e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->dev_idx = edac_idx; 427e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#ifdef CONFIG_EDAC_DEBUG 428e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_debug_level >= 3) 429e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_dump_device(edac_dev); 430e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson#endif 43152490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson down(&device_ctls_mutex); 432e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 433e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (add_edac_dev_to_global_list(edac_dev)) 434e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson goto fail0; 435e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 436e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* set load time so that error rate can be tracked */ 437e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->start_time = jiffies; 438e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 439e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* create this instance's sysfs entries */ 440e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_device_create_sysfs(edac_dev)) { 441e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_WARNING, 442052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "failed to create sysfs device\n"); 443e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson goto fail1; 444e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 445e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 446e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* If there IS a check routine, then we are running POLLED */ 447e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_dev->edac_check != NULL) { 448e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* This instance is NOW RUNNING */ 449e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->op_state = OP_RUNNING_POLL; 450e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 45181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* 45281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * enable workq processing on this instance, 45381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * default = 1000 msec 45481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 45581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_device_workq_setup(edac_dev, 1000); 456e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } else { 457e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->op_state = OP_RUNNING_INTERRUPT; 458e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 459e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 460e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Report action taken */ 461e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_INFO, 462052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "Giving out device to module '%s' controller " 463052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "'%s': DEV '%s' (%s)\n", 464052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->mod_name, 465052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->ctl_name, 466052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson dev_name(edac_dev), 467052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_op_state_toString(edac_dev->op_state)); 468e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 46952490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson up(&device_ctls_mutex); 470e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return 0; 471e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 472052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 473e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Some error, so remove the entry from the lsit */ 474e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson del_edac_device_from_global_list(edac_dev); 475e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 476052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 47752490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson up(&device_ctls_mutex); 478e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return 1; 479e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 480e27e3dac651771fe3250f6305dee277bce29fc5dDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_add_device); 481e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 482e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/** 483e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_del_device: 484e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Remove sysfs entries for specified edac_device structure and 485e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * then remove edac_device structure from global list 486e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 487e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * @pdev: 488e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Pointer to 'struct device' representing edac_device 489e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * structure to remove. 490e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * 491e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Return: 492e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * Pointer to removed edac_device structure, 493e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * OR NULL if device not found. 494e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 495079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct edac_device_ctl_info *edac_device_del_device(struct device *dev) 496e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 497e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_ctl_info *edac_dev; 498e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 499e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson debugf0("MC: %s()\n", __func__); 500e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 50152490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson down(&device_ctls_mutex); 502e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 50352490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson /* Find the structure on the list, if not there, then leave */ 50452490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson edac_dev = find_edac_device_by_dev(dev); 50552490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson if (edac_dev == NULL) { 50652490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson up(&device_ctls_mutex); 507e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return NULL; 508e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 509e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 510e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* mark this instance as OFFLINE */ 511e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->op_state = OP_OFFLINE; 512e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 513e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* clear workq processing on this instance */ 51481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_device_workq_teardown(edac_dev); 515e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 516e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Tear down the sysfs entries for this instance */ 517e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_remove_sysfs(edac_dev); 518e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 519e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* deregister from global list */ 520e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson del_edac_device_from_global_list(edac_dev); 521e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 52252490c8d07680a7ecc3c1a70a16841455d37e96aDouglas Thompson up(&device_ctls_mutex); 523e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 524e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_printk(KERN_INFO, EDAC_MC, 525052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "Removed device %d for %s %s: DEV %s\n", 526052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->dev_idx, 527052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->mod_name, edac_dev->ctl_name, dev_name(edac_dev)); 528e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 529e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return edac_dev; 530e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 531079708b9173595bf74b31b14c36e946359ae6c7eDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_del_device); 532e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 533e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstatic inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev) 534e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 535e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return edac_dev->log_ce; 536e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 537e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 538e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonstatic inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev) 539e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 540e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return edac_dev->log_ue; 541e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 542e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 543079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info 544052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson *edac_dev) 545e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 546e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return edac_dev->panic_on_ue; 547e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 548e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 549e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 550e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_handle_ce 551e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * perform a common output and handling of an 'edac_dev' CE event 552e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 553e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonvoid edac_device_handle_ce(struct edac_device_ctl_info *edac_dev, 554052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson int inst_nr, int block_nr, const char *msg) 555e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 556e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_instance *instance; 557e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_block *block = NULL; 558e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 559e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) { 560e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_ERR, 561052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: 'instance' out of range " 562052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", inst_nr, 563052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->nr_instances); 564e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return; 565e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 566e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 567e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson instance = edac_dev->instances + inst_nr; 568e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 569e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) { 570e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_ERR, 571052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: instance %d 'block' " 572052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "out of range (%d >= %d)\n", 573052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson inst_nr, block_nr, 574052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson instance->nr_blocks); 575e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return; 576e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 577e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 578e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (instance->nr_blocks > 0) { 579e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson block = instance->blocks + block_nr; 580e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson block->counters.ce_count++; 581e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 582e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 583e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Propogate the count up the 'totals' tree */ 584e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson instance->counters.ce_count++; 585e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->counters.ce_count++; 586e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 587e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_device_get_log_ce(edac_dev)) 588e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_WARNING, 589052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "CE: %s instance: %s block: %s '%s'\n", 590052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->ctl_name, instance->name, 591052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson block ? block->name : "N/A", msg); 592e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 593e27e3dac651771fe3250f6305dee277bce29fc5dDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_handle_ce); 594e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 595e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson/* 596e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * edac_device_handle_ue 597e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson * perform a common output and handling of an 'edac_dev' UE event 598e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson */ 599e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompsonvoid edac_device_handle_ue(struct edac_device_ctl_info *edac_dev, 600052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson int inst_nr, int block_nr, const char *msg) 601e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson{ 602e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_instance *instance; 603e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson struct edac_device_block *block = NULL; 604e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 605e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) { 606e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_ERR, 607052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: 'instance' out of range " 608052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", inst_nr, 609052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->nr_instances); 610e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return; 611e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 612e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 613e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson instance = edac_dev->instances + inst_nr; 614e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 615e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) { 616e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_ERR, 617052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: instance %d 'block' " 618052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "out of range (%d >= %d)\n", 619052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson inst_nr, block_nr, 620052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson instance->nr_blocks); 621e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson return; 622e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 623e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 624e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (instance->nr_blocks > 0) { 625e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson block = instance->blocks + block_nr; 626e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson block->counters.ue_count++; 627e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson } 628e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 629e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson /* Propogate the count up the 'totals' tree */ 630e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson instance->counters.ue_count++; 631e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_dev->counters.ue_count++; 632e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 633e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_device_get_log_ue(edac_dev)) 634e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson edac_device_printk(edac_dev, KERN_EMERG, 635052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "UE: %s instance: %s block: %s '%s'\n", 636052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->ctl_name, instance->name, 637052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson block ? block->name : "N/A", msg); 638e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson 639e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson if (edac_device_get_panic_on_ue(edac_dev)) 640d391a7b8147d12b0e5141fb65829856fb0c289dcDouglas Thompson panic("EDAC %s: UE instance: %s block %s '%s'\n", 641052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson edac_dev->ctl_name, instance->name, 642052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson block ? block->name : "N/A", msg); 643e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson} 644079708b9173595bf74b31b14c36e946359ae6c7eDouglas ThompsonEXPORT_SYMBOL_GPL(edac_device_handle_ue); 645