d391a7b814
The error handling output strings needed to be refactored for better displaying of the error informaton. Also needed to added offset_value for output as well Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
640 lines
17 KiB
C
640 lines
17 KiB
C
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/*
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* edac_device.c
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* (C) 2007 www.douglaskthompson.com
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*
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* Written by Doug Thompson <norsk5@xmission.com>
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*
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* edac_device API implementation
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* 19 Jan 2007
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/smp.h>
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#include <linux/init.h>
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#include <linux/sysctl.h>
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#include <linux/highmem.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/sysdev.h>
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#include <linux/ctype.h>
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#include <linux/workqueue.h>
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include "edac_core.h"
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#include "edac_module.h"
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/* lock to memory controller's control array */
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static DECLARE_MUTEX(device_ctls_mutex);
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static struct list_head edac_device_list = LIST_HEAD_INIT(edac_device_list);
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static inline void lock_device_list(void)
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{
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down(&device_ctls_mutex);
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}
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static inline void unlock_device_list(void)
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{
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up(&device_ctls_mutex);
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}
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#ifdef CONFIG_EDAC_DEBUG
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static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
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{
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debugf3("\tedac_dev = %p dev_idx=%d \n", edac_dev, edac_dev->dev_idx);
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debugf4("\tedac_dev->edac_check = %p\n", edac_dev->edac_check);
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debugf3("\tdev = %p\n", edac_dev->dev);
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debugf3("\tmod_name:ctl_name = %s:%s\n",
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edac_dev->mod_name, edac_dev->ctl_name);
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debugf3("\tpvt_info = %p\n\n", edac_dev->pvt_info);
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}
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#endif /* CONFIG_EDAC_DEBUG */
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/*
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* The alloc() and free() functions for the 'edac_device' control info
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* structure. A MC driver will allocate one of these for each edac_device
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* it is going to control/register with the EDAC CORE.
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*/
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struct edac_device_ctl_info *edac_device_alloc_ctl_info(
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unsigned sz_private,
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char *edac_device_name,
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unsigned nr_instances,
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char *edac_block_name,
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unsigned nr_blocks,
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unsigned offset_value,
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struct edac_attrib_spec
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*attrib_spec,
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unsigned nr_attribs)
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{
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struct edac_device_ctl_info *dev_ctl;
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struct edac_device_instance *dev_inst, *inst;
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struct edac_device_block *dev_blk, *blk_p, *blk;
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struct edac_attrib *dev_attrib, *attrib_p, *attrib;
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unsigned total_size;
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unsigned count;
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unsigned instance, block, attr;
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void *pvt;
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debugf1("%s() instances=%d blocks=%d\n",
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__func__, nr_instances, nr_blocks);
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/* Figure out the offsets of the various items from the start of an
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* ctl_info structure. We want the alignment of each item
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* to be at least as stringent as what the compiler would
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* provide if we could simply hardcode everything into a single struct.
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*/
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dev_ctl = (struct edac_device_ctl_info *)0;
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/* Calc the 'end' offset past the ctl_info structure */
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dev_inst = (struct edac_device_instance *)
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edac_align_ptr(&dev_ctl[1], sizeof(*dev_inst));
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/* Calc the 'end' offset past the instance array */
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dev_blk = (struct edac_device_block *)
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edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk));
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/* Calc the 'end' offset past the dev_blk array */
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count = nr_instances * nr_blocks;
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dev_attrib = (struct edac_attrib *)
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edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib));
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/* Check for case of NO attributes specified */
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if (nr_attribs > 0)
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count *= nr_attribs;
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/* Calc the 'end' offset past the attributes array */
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pvt = edac_align_ptr(&dev_attrib[count], sz_private);
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total_size = ((unsigned long)pvt) + sz_private;
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/* Allocate the amount of memory for the set of control structures */
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if ((dev_ctl = kmalloc(total_size, GFP_KERNEL)) == NULL)
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return NULL;
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/* Adjust pointers so they point within the memory we just allocated
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* rather than an imaginary chunk of memory located at address 0.
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*/
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dev_inst = (struct edac_device_instance *)
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(((char *)dev_ctl) + ((unsigned long)dev_inst));
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dev_blk = (struct edac_device_block *)
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(((char *)dev_ctl) + ((unsigned long)dev_blk));
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dev_attrib = (struct edac_attrib *)
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(((char *)dev_ctl) + ((unsigned long)dev_attrib));
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pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;
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memset(dev_ctl, 0, total_size); /* clear all fields */
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dev_ctl->nr_instances = nr_instances;
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dev_ctl->instances = dev_inst;
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dev_ctl->pvt_info = pvt;
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/* Name of this edac device, ensure null terminated */
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snprintf(dev_ctl->name, sizeof(dev_ctl->name), "%s", edac_device_name);
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dev_ctl->name[sizeof(dev_ctl->name) - 1] = '\0';
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/* Initialize every Instance */
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for (instance = 0; instance < nr_instances; instance++) {
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inst = &dev_inst[instance];
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inst->ctl = dev_ctl;
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inst->nr_blocks = nr_blocks;
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blk_p = &dev_blk[instance * nr_blocks];
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inst->blocks = blk_p;
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/* name of this instance */
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snprintf(inst->name, sizeof(inst->name),
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"%s%u", edac_device_name, instance);
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inst->name[sizeof(inst->name) - 1] = '\0';
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/* Initialize every block in each instance */
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for (block = 0; block < nr_blocks; block++) {
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blk = &blk_p[block];
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blk->instance = inst;
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blk->nr_attribs = nr_attribs;
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attrib_p = &dev_attrib[block * nr_attribs];
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blk->attribs = attrib_p;
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snprintf(blk->name, sizeof(blk->name),
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"%s%d", edac_block_name, block+offset_value);
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blk->name[sizeof(blk->name) - 1] = '\0';
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debugf1("%s() instance=%d block=%d name=%s\n",
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__func__, instance, block, blk->name);
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if (attrib_spec != NULL) {
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/* when there is an attrib_spec passed int then
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* Initialize every attrib of each block
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*/
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for (attr = 0; attr < nr_attribs; attr++) {
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attrib = &attrib_p[attr];
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attrib->block = blk;
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/* Link each attribute to the caller's
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* spec entry, for name and type
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*/
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attrib->spec = &attrib_spec[attr];
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}
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}
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}
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}
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/* Mark this instance as merely ALLOCATED */
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dev_ctl->op_state = OP_ALLOC;
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return dev_ctl;
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}
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EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
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/*
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* edac_device_free_ctl_info()
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* frees the memory allocated by the edac_device_alloc_ctl_info()
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* function
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*/
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void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
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{
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kfree(ctl_info);
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}
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EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
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/*
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* find_edac_device_by_dev
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* scans the edac_device list for a specific 'struct device *'
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*/
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static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
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{
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struct edac_device_ctl_info *edac_dev;
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struct list_head *item;
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debugf3("%s()\n", __func__);
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list_for_each(item, &edac_device_list) {
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edac_dev = list_entry(item, struct edac_device_ctl_info, link);
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if (edac_dev->dev == dev)
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return edac_dev;
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}
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return NULL;
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}
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/*
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* add_edac_dev_to_global_list
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* Before calling this function, caller must
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* assign a unique value to edac_dev->dev_idx.
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* Return:
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* 0 on success
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* 1 on failure.
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*/
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static int add_edac_dev_to_global_list(struct edac_device_ctl_info *edac_dev)
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{
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struct list_head *item, *insert_before;
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struct edac_device_ctl_info *rover;
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insert_before = &edac_device_list;
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/* Determine if already on the list */
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if (unlikely((rover = find_edac_device_by_dev(edac_dev->dev)) != NULL))
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goto fail0;
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/* Insert in ascending order by 'dev_idx', so find position */
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list_for_each(item, &edac_device_list) {
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rover = list_entry(item, struct edac_device_ctl_info, link);
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if (rover->dev_idx >= edac_dev->dev_idx) {
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if (unlikely(rover->dev_idx == edac_dev->dev_idx))
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goto fail1;
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insert_before = item;
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break;
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}
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}
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list_add_tail_rcu(&edac_dev->link, insert_before);
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return 0;
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fail0:
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edac_printk(KERN_WARNING, EDAC_MC,
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"%s (%s) %s %s already assigned %d\n",
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rover->dev->bus_id, dev_name(rover),
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rover->mod_name, rover->ctl_name, rover->dev_idx);
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return 1;
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fail1:
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edac_printk(KERN_WARNING, EDAC_MC,
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"bug in low-level driver: attempt to assign\n"
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" duplicate dev_idx %d in %s()\n", rover->dev_idx,
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__func__);
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return 1;
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}
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/*
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* complete_edac_device_list_del
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*/
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static void complete_edac_device_list_del(struct rcu_head *head)
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{
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struct edac_device_ctl_info *edac_dev;
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edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
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INIT_LIST_HEAD(&edac_dev->link);
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complete(&edac_dev->complete);
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}
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/*
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* del_edac_device_from_global_list
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*/
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static void del_edac_device_from_global_list(struct edac_device_ctl_info
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*edac_device)
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{
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list_del_rcu(&edac_device->link);
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init_completion(&edac_device->complete);
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call_rcu(&edac_device->rcu, complete_edac_device_list_del);
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wait_for_completion(&edac_device->complete);
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}
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/**
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* edac_device_find
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* Search for a edac_device_ctl_info structure whose index is 'idx'.
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*
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* If found, return a pointer to the structure.
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* Else return NULL.
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*
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* Caller must hold device_ctls_mutex.
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*/
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struct edac_device_ctl_info *edac_device_find(int idx)
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{
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struct list_head *item;
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struct edac_device_ctl_info *edac_dev;
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/* Iterate over list, looking for exact match of ID */
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list_for_each(item, &edac_device_list) {
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edac_dev = list_entry(item, struct edac_device_ctl_info, link);
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if (edac_dev->dev_idx >= idx) {
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if (edac_dev->dev_idx == idx)
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return edac_dev;
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/* not on list, so terminate early */
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break;
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}
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}
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return NULL;
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}
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EXPORT_SYMBOL(edac_device_find);
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/*
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* edac_device_workq_function
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* performs the operation scheduled by a workq request
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*/
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static void edac_device_workq_function(struct work_struct *work_req)
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{
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struct delayed_work *d_work = (struct delayed_work *)work_req;
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struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
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//debugf0("%s() here and running\n", __func__);
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lock_device_list();
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/* Only poll controllers that are running polled and have a check */
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if ((edac_dev->op_state == OP_RUNNING_POLL) &&
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(edac_dev->edac_check != NULL)) {
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edac_dev->edac_check(edac_dev);
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}
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unlock_device_list();
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/* Reschedule */
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queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
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}
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/*
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* edac_device_workq_setup
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* initialize a workq item for this edac_device instance
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* passing in the new delay period in msec
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*/
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void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev,
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unsigned msec)
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{
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debugf0("%s()\n", __func__);
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edac_dev->poll_msec = msec;
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edac_calc_delay(edac_dev); /* Calc delay jiffies */
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INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
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queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
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}
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/*
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* edac_device_workq_teardown
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* stop the workq processing on this edac_dev
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*/
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void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
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{
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int status;
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status = cancel_delayed_work(&edac_dev->work);
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if (status == 0) {
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/* workq instance might be running, wait for it */
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flush_workqueue(edac_workqueue);
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}
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}
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/*
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* edac_device_reset_delay_period
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*/
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void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
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unsigned long value)
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{
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lock_device_list();
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/* cancel the current workq request */
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edac_device_workq_teardown(edac_dev);
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/* restart the workq request, with new delay value */
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edac_device_workq_setup(edac_dev, value);
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unlock_device_list();
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}
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/**
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* edac_device_add_device: Insert the 'edac_dev' structure into the
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* edac_device global list and create sysfs entries associated with
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* edac_device structure.
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* @edac_device: pointer to the edac_device structure to be added to the list
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* @edac_idx: A unique numeric identifier to be assigned to the
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* 'edac_device' structure.
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*
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* Return:
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* 0 Success
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* !0 Failure
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*/
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int edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx)
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{
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debugf0("%s()\n", __func__);
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edac_dev->dev_idx = edac_idx;
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#ifdef CONFIG_EDAC_DEBUG
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if (edac_debug_level >= 3)
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edac_device_dump_device(edac_dev);
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#endif
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lock_device_list();
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if (add_edac_dev_to_global_list(edac_dev))
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goto fail0;
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/* set load time so that error rate can be tracked */
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edac_dev->start_time = jiffies;
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/* create this instance's sysfs entries */
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if (edac_device_create_sysfs(edac_dev)) {
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edac_device_printk(edac_dev, KERN_WARNING,
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"failed to create sysfs device\n");
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goto fail1;
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}
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/* If there IS a check routine, then we are running POLLED */
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if (edac_dev->edac_check != NULL) {
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/* This instance is NOW RUNNING */
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edac_dev->op_state = OP_RUNNING_POLL;
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/*
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* enable workq processing on this instance,
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* default = 1000 msec
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*/
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edac_device_workq_setup(edac_dev, 1000);
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} else {
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edac_dev->op_state = OP_RUNNING_INTERRUPT;
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}
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/* Report action taken */
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edac_device_printk(edac_dev, KERN_INFO,
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"Giving out device to module '%s' controller '%s': DEV '%s' (%s)\n",
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edac_dev->mod_name,
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edac_dev->ctl_name,
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dev_name(edac_dev),
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edac_op_state_toString(edac_dev->op_state)
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);
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unlock_device_list();
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return 0;
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fail1:
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/* Some error, so remove the entry from the lsit */
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del_edac_device_from_global_list(edac_dev);
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fail0:
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unlock_device_list();
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return 1;
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}
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EXPORT_SYMBOL_GPL(edac_device_add_device);
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/**
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* edac_device_del_device:
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* Remove sysfs entries for specified edac_device structure and
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* then remove edac_device structure from global list
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*
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* @pdev:
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* Pointer to 'struct device' representing edac_device
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* structure to remove.
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*
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* Return:
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* Pointer to removed edac_device structure,
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* OR NULL if device not found.
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*/
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struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
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{
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struct edac_device_ctl_info *edac_dev;
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debugf0("MC: %s()\n", __func__);
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lock_device_list();
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if ((edac_dev = find_edac_device_by_dev(dev)) == NULL) {
|
|
unlock_device_list();
|
|
return NULL;
|
|
}
|
|
|
|
/* mark this instance as OFFLINE */
|
|
edac_dev->op_state = OP_OFFLINE;
|
|
|
|
/* clear workq processing on this instance */
|
|
edac_device_workq_teardown(edac_dev);
|
|
|
|
/* Tear down the sysfs entries for this instance */
|
|
edac_device_remove_sysfs(edac_dev);
|
|
|
|
/* deregister from global list */
|
|
del_edac_device_from_global_list(edac_dev);
|
|
|
|
unlock_device_list();
|
|
|
|
edac_printk(KERN_INFO, EDAC_MC,
|
|
"Removed device %d for %s %s: DEV %s\n",
|
|
edac_dev->dev_idx,
|
|
edac_dev->mod_name, edac_dev->ctl_name, dev_name(edac_dev));
|
|
|
|
return edac_dev;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(edac_device_del_device);
|
|
|
|
static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
return edac_dev->log_ce;
|
|
}
|
|
|
|
static inline int edac_device_get_log_ue(struct edac_device_ctl_info *edac_dev)
|
|
{
|
|
return edac_dev->log_ue;
|
|
}
|
|
|
|
static inline int edac_device_get_panic_on_ue(struct edac_device_ctl_info
|
|
*edac_dev)
|
|
{
|
|
return edac_dev->panic_on_ue;
|
|
}
|
|
|
|
/*
|
|
* edac_device_handle_ce
|
|
* perform a common output and handling of an 'edac_dev' CE event
|
|
*/
|
|
void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
|
|
int inst_nr, int block_nr, const char *msg)
|
|
{
|
|
struct edac_device_instance *instance;
|
|
struct edac_device_block *block = NULL;
|
|
|
|
if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
|
|
edac_device_printk(edac_dev, KERN_ERR,
|
|
"INTERNAL ERROR: 'instance' out of range "
|
|
"(%d >= %d)\n", inst_nr,
|
|
edac_dev->nr_instances);
|
|
return;
|
|
}
|
|
|
|
instance = edac_dev->instances + inst_nr;
|
|
|
|
if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
|
|
edac_device_printk(edac_dev, KERN_ERR,
|
|
"INTERNAL ERROR: instance %d 'block' out of range "
|
|
"(%d >= %d)\n", inst_nr, block_nr,
|
|
instance->nr_blocks);
|
|
return;
|
|
}
|
|
|
|
if (instance->nr_blocks > 0) {
|
|
block = instance->blocks + block_nr;
|
|
block->counters.ce_count++;
|
|
}
|
|
|
|
/* Propogate the count up the 'totals' tree */
|
|
instance->counters.ce_count++;
|
|
edac_dev->counters.ce_count++;
|
|
|
|
if (edac_device_get_log_ce(edac_dev))
|
|
edac_device_printk(edac_dev, KERN_WARNING,
|
|
"CE: %s instance: %s block: %s '%s'\n",
|
|
edac_dev->ctl_name, instance->name,
|
|
block ? block->name : "N/A", msg);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(edac_device_handle_ce);
|
|
|
|
/*
|
|
* edac_device_handle_ue
|
|
* perform a common output and handling of an 'edac_dev' UE event
|
|
*/
|
|
void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
|
|
int inst_nr, int block_nr, const char *msg)
|
|
{
|
|
struct edac_device_instance *instance;
|
|
struct edac_device_block *block = NULL;
|
|
|
|
if ((inst_nr >= edac_dev->nr_instances) || (inst_nr < 0)) {
|
|
edac_device_printk(edac_dev, KERN_ERR,
|
|
"INTERNAL ERROR: 'instance' out of range "
|
|
"(%d >= %d)\n", inst_nr,
|
|
edac_dev->nr_instances);
|
|
return;
|
|
}
|
|
|
|
instance = edac_dev->instances + inst_nr;
|
|
|
|
if ((block_nr >= instance->nr_blocks) || (block_nr < 0)) {
|
|
edac_device_printk(edac_dev, KERN_ERR,
|
|
"INTERNAL ERROR: instance %d 'block' out of range "
|
|
"(%d >= %d)\n", inst_nr, block_nr,
|
|
instance->nr_blocks);
|
|
return;
|
|
}
|
|
|
|
if (instance->nr_blocks > 0) {
|
|
block = instance->blocks + block_nr;
|
|
block->counters.ue_count++;
|
|
}
|
|
|
|
/* Propogate the count up the 'totals' tree */
|
|
instance->counters.ue_count++;
|
|
edac_dev->counters.ue_count++;
|
|
|
|
if (edac_device_get_log_ue(edac_dev))
|
|
edac_device_printk(edac_dev, KERN_EMERG,
|
|
"UE: %s instance: %s block: %s '%s'\n",
|
|
edac_dev->ctl_name, instance->name,
|
|
block ? block->name : "N/A", msg);
|
|
|
|
if (edac_device_get_panic_on_ue(edac_dev))
|
|
panic("EDAC %s: UE instance: %s block %s '%s'\n",
|
|
edac_dev->ctl_name, instance->name,
|
|
block ? block->name : "N/A", msg);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(edac_device_handle_ue);
|