| /* |
| * edac_mc kernel module |
| * (C) 2005, 2006 Linux Networx (http://lnxi.com) |
| * This file may be distributed under the terms of the |
| * GNU General Public License. |
| * |
| * Written by Thayne Harbaugh |
| * Based on work by Dan Hollis <goemon at anime dot net> and others. |
| * http://www.anime.net/~goemon/linux-ecc/ |
| * |
| * Modified by Dave Peterson and Doug Thompson |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/proc_fs.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/smp.h> |
| #include <linux/init.h> |
| #include <linux/sysctl.h> |
| #include <linux/highmem.h> |
| #include <linux/timer.h> |
| #include <linux/slab.h> |
| #include <linux/jiffies.h> |
| #include <linux/spinlock.h> |
| #include <linux/list.h> |
| #include <linux/sysdev.h> |
| #include <linux/ctype.h> |
| #include <linux/edac.h> |
| #include <asm/uaccess.h> |
| #include <asm/page.h> |
| #include <asm/edac.h> |
| #include "edac_core.h" |
| #include "edac_module.h" |
| |
| /* lock to memory controller's control array */ |
| static DEFINE_MUTEX(mem_ctls_mutex); |
| static LIST_HEAD(mc_devices); |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| |
| static void edac_mc_dump_channel(struct channel_info *chan) |
| { |
| debugf4("\tchannel = %p\n", chan); |
| debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); |
| debugf4("\tchannel->ce_count = %d\n", chan->ce_count); |
| debugf4("\tchannel->label = '%s'\n", chan->label); |
| debugf4("\tchannel->csrow = %p\n\n", chan->csrow); |
| } |
| |
| static void edac_mc_dump_csrow(struct csrow_info *csrow) |
| { |
| debugf4("\tcsrow = %p\n", csrow); |
| debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); |
| debugf4("\tcsrow->first_page = 0x%lx\n", csrow->first_page); |
| debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); |
| debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); |
| debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); |
| debugf4("\tcsrow->nr_channels = %d\n", csrow->nr_channels); |
| debugf4("\tcsrow->channels = %p\n", csrow->channels); |
| debugf4("\tcsrow->mci = %p\n\n", csrow->mci); |
| } |
| |
| static void edac_mc_dump_mci(struct mem_ctl_info *mci) |
| { |
| debugf3("\tmci = %p\n", mci); |
| debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); |
| debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); |
| debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); |
| debugf4("\tmci->edac_check = %p\n", mci->edac_check); |
| debugf3("\tmci->nr_csrows = %d, csrows = %p\n", |
| mci->nr_csrows, mci->csrows); |
| debugf3("\tdev = %p\n", mci->dev); |
| debugf3("\tmod_name:ctl_name = %s:%s\n", mci->mod_name, mci->ctl_name); |
| debugf3("\tpvt_info = %p\n\n", mci->pvt_info); |
| } |
| |
| #endif /* CONFIG_EDAC_DEBUG */ |
| |
| /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. |
| * Adjust 'ptr' so that its alignment is at least as stringent as what the |
| * compiler would provide for X and return the aligned result. |
| * |
| * If 'size' is a constant, the compiler will optimize this whole function |
| * down to either a no-op or the addition of a constant to the value of 'ptr'. |
| */ |
| void *edac_align_ptr(void *ptr, unsigned size) |
| { |
| unsigned align, r; |
| |
| /* Here we assume that the alignment of a "long long" is the most |
| * stringent alignment that the compiler will ever provide by default. |
| * As far as I know, this is a reasonable assumption. |
| */ |
| if (size > sizeof(long)) |
| align = sizeof(long long); |
| else if (size > sizeof(int)) |
| align = sizeof(long); |
| else if (size > sizeof(short)) |
| align = sizeof(int); |
| else if (size > sizeof(char)) |
| align = sizeof(short); |
| else |
| return (char *)ptr; |
| |
| r = size % align; |
| |
| if (r == 0) |
| return (char *)ptr; |
| |
| return (void *)(((unsigned long)ptr) + align - r); |
| } |
| |
| /** |
| * edac_mc_alloc: Allocate a struct mem_ctl_info structure |
| * @size_pvt: size of private storage needed |
| * @nr_csrows: Number of CWROWS needed for this MC |
| * @nr_chans: Number of channels for the MC |
| * |
| * Everything is kmalloc'ed as one big chunk - more efficient. |
| * Only can be used if all structures have the same lifetime - otherwise |
| * you have to allocate and initialize your own structures. |
| * |
| * Use edac_mc_free() to free mc structures allocated by this function. |
| * |
| * Returns: |
| * NULL allocation failed |
| * struct mem_ctl_info pointer |
| */ |
| struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, |
| unsigned nr_chans, int edac_index) |
| { |
| struct mem_ctl_info *mci; |
| struct csrow_info *csi, *csrow; |
| struct channel_info *chi, *chp, *chan; |
| void *pvt; |
| unsigned size; |
| int row, chn; |
| int err; |
| |
| /* Figure out the offsets of the various items from the start of an mc |
| * structure. We want the alignment of each item to be at least as |
| * stringent as what the compiler would provide if we could simply |
| * hardcode everything into a single struct. |
| */ |
| mci = (struct mem_ctl_info *)0; |
| csi = edac_align_ptr(&mci[1], sizeof(*csi)); |
| chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi)); |
| pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); |
| size = ((unsigned long)pvt) + sz_pvt; |
| |
| mci = kzalloc(size, GFP_KERNEL); |
| if (mci == NULL) |
| return NULL; |
| |
| /* Adjust pointers so they point within the memory we just allocated |
| * rather than an imaginary chunk of memory located at address 0. |
| */ |
| csi = (struct csrow_info *)(((char *)mci) + ((unsigned long)csi)); |
| chi = (struct channel_info *)(((char *)mci) + ((unsigned long)chi)); |
| pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL; |
| |
| /* setup index and various internal pointers */ |
| mci->mc_idx = edac_index; |
| mci->csrows = csi; |
| mci->pvt_info = pvt; |
| mci->nr_csrows = nr_csrows; |
| |
| for (row = 0; row < nr_csrows; row++) { |
| csrow = &csi[row]; |
| csrow->csrow_idx = row; |
| csrow->mci = mci; |
| csrow->nr_channels = nr_chans; |
| chp = &chi[row * nr_chans]; |
| csrow->channels = chp; |
| |
| for (chn = 0; chn < nr_chans; chn++) { |
| chan = &chp[chn]; |
| chan->chan_idx = chn; |
| chan->csrow = csrow; |
| } |
| } |
| |
| mci->op_state = OP_ALLOC; |
| |
| /* |
| * Initialize the 'root' kobj for the edac_mc controller |
| */ |
| err = edac_mc_register_sysfs_main_kobj(mci); |
| if (err) { |
| kfree(mci); |
| return NULL; |
| } |
| |
| /* at this point, the root kobj is valid, and in order to |
| * 'free' the object, then the function: |
| * edac_mc_unregister_sysfs_main_kobj() must be called |
| * which will perform kobj unregistration and the actual free |
| * will occur during the kobject callback operation |
| */ |
| return mci; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_alloc); |
| |
| /** |
| * edac_mc_free |
| * 'Free' a previously allocated 'mci' structure |
| * @mci: pointer to a struct mem_ctl_info structure |
| */ |
| void edac_mc_free(struct mem_ctl_info *mci) |
| { |
| edac_mc_unregister_sysfs_main_kobj(mci); |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_free); |
| |
| |
| /* |
| * find_mci_by_dev |
| * |
| * scan list of controllers looking for the one that manages |
| * the 'dev' device |
| */ |
| static struct mem_ctl_info *find_mci_by_dev(struct device *dev) |
| { |
| struct mem_ctl_info *mci; |
| struct list_head *item; |
| |
| debugf3("%s()\n", __func__); |
| |
| list_for_each(item, &mc_devices) { |
| mci = list_entry(item, struct mem_ctl_info, link); |
| |
| if (mci->dev == dev) |
| return mci; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * handler for EDAC to check if NMI type handler has asserted interrupt |
| */ |
| static int edac_mc_assert_error_check_and_clear(void) |
| { |
| int old_state; |
| |
| if (edac_op_state == EDAC_OPSTATE_POLL) |
| return 1; |
| |
| old_state = edac_err_assert; |
| edac_err_assert = 0; |
| |
| return old_state; |
| } |
| |
| /* |
| * edac_mc_workq_function |
| * performs the operation scheduled by a workq request |
| */ |
| static void edac_mc_workq_function(struct work_struct *work_req) |
| { |
| struct delayed_work *d_work = to_delayed_work(work_req); |
| struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work); |
| |
| mutex_lock(&mem_ctls_mutex); |
| |
| /* if this control struct has movd to offline state, we are done */ |
| if (mci->op_state == OP_OFFLINE) { |
| mutex_unlock(&mem_ctls_mutex); |
| return; |
| } |
| |
| /* Only poll controllers that are running polled and have a check */ |
| if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL)) |
| mci->edac_check(mci); |
| |
| mutex_unlock(&mem_ctls_mutex); |
| |
| /* Reschedule */ |
| queue_delayed_work(edac_workqueue, &mci->work, |
| msecs_to_jiffies(edac_mc_get_poll_msec())); |
| } |
| |
| /* |
| * edac_mc_workq_setup |
| * initialize a workq item for this mci |
| * passing in the new delay period in msec |
| * |
| * locking model: |
| * |
| * called with the mem_ctls_mutex held |
| */ |
| static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec) |
| { |
| debugf0("%s()\n", __func__); |
| |
| /* if this instance is not in the POLL state, then simply return */ |
| if (mci->op_state != OP_RUNNING_POLL) |
| return; |
| |
| INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function); |
| queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec)); |
| } |
| |
| /* |
| * edac_mc_workq_teardown |
| * stop the workq processing on this mci |
| * |
| * locking model: |
| * |
| * called WITHOUT lock held |
| */ |
| static void edac_mc_workq_teardown(struct mem_ctl_info *mci) |
| { |
| int status; |
| |
| status = cancel_delayed_work(&mci->work); |
| if (status == 0) { |
| debugf0("%s() not canceled, flush the queue\n", |
| __func__); |
| |
| /* workq instance might be running, wait for it */ |
| flush_workqueue(edac_workqueue); |
| } |
| } |
| |
| /* |
| * edac_mc_reset_delay_period(unsigned long value) |
| * |
| * user space has updated our poll period value, need to |
| * reset our workq delays |
| */ |
| void edac_mc_reset_delay_period(int value) |
| { |
| struct mem_ctl_info *mci; |
| struct list_head *item; |
| |
| mutex_lock(&mem_ctls_mutex); |
| |
| /* scan the list and turn off all workq timers, doing so under lock |
| */ |
| list_for_each(item, &mc_devices) { |
| mci = list_entry(item, struct mem_ctl_info, link); |
| |
| if (mci->op_state == OP_RUNNING_POLL) |
| cancel_delayed_work(&mci->work); |
| } |
| |
| mutex_unlock(&mem_ctls_mutex); |
| |
| |
| /* re-walk the list, and reset the poll delay */ |
| mutex_lock(&mem_ctls_mutex); |
| |
| list_for_each(item, &mc_devices) { |
| mci = list_entry(item, struct mem_ctl_info, link); |
| |
| edac_mc_workq_setup(mci, (unsigned long) value); |
| } |
| |
| mutex_unlock(&mem_ctls_mutex); |
| } |
| |
| |
| |
| /* Return 0 on success, 1 on failure. |
| * Before calling this function, caller must |
| * assign a unique value to mci->mc_idx. |
| * |
| * locking model: |
| * |
| * called with the mem_ctls_mutex lock held |
| */ |
| static int add_mc_to_global_list(struct mem_ctl_info *mci) |
| { |
| struct list_head *item, *insert_before; |
| struct mem_ctl_info *p; |
| |
| insert_before = &mc_devices; |
| |
| p = find_mci_by_dev(mci->dev); |
| if (unlikely(p != NULL)) |
| goto fail0; |
| |
| list_for_each(item, &mc_devices) { |
| p = list_entry(item, struct mem_ctl_info, link); |
| |
| if (p->mc_idx >= mci->mc_idx) { |
| if (unlikely(p->mc_idx == mci->mc_idx)) |
| goto fail1; |
| |
| insert_before = item; |
| break; |
| } |
| } |
| |
| list_add_tail_rcu(&mci->link, insert_before); |
| atomic_inc(&edac_handlers); |
| return 0; |
| |
| fail0: |
| edac_printk(KERN_WARNING, EDAC_MC, |
| "%s (%s) %s %s already assigned %d\n", dev_name(p->dev), |
| edac_dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx); |
| return 1; |
| |
| fail1: |
| edac_printk(KERN_WARNING, EDAC_MC, |
| "bug in low-level driver: attempt to assign\n" |
| " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); |
| return 1; |
| } |
| |
| static void complete_mc_list_del(struct rcu_head *head) |
| { |
| struct mem_ctl_info *mci; |
| |
| mci = container_of(head, struct mem_ctl_info, rcu); |
| INIT_LIST_HEAD(&mci->link); |
| } |
| |
| static void del_mc_from_global_list(struct mem_ctl_info *mci) |
| { |
| atomic_dec(&edac_handlers); |
| list_del_rcu(&mci->link); |
| call_rcu(&mci->rcu, complete_mc_list_del); |
| rcu_barrier(); |
| } |
| |
| /** |
| * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'. |
| * |
| * If found, return a pointer to the structure. |
| * Else return NULL. |
| * |
| * Caller must hold mem_ctls_mutex. |
| */ |
| struct mem_ctl_info *edac_mc_find(int idx) |
| { |
| struct list_head *item; |
| struct mem_ctl_info *mci; |
| |
| list_for_each(item, &mc_devices) { |
| mci = list_entry(item, struct mem_ctl_info, link); |
| |
| if (mci->mc_idx >= idx) { |
| if (mci->mc_idx == idx) |
| return mci; |
| |
| break; |
| } |
| } |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(edac_mc_find); |
| |
| /** |
| * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and |
| * create sysfs entries associated with mci structure |
| * @mci: pointer to the mci structure to be added to the list |
| * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure. |
| * |
| * Return: |
| * 0 Success |
| * !0 Failure |
| */ |
| |
| /* FIXME - should a warning be printed if no error detection? correction? */ |
| int edac_mc_add_mc(struct mem_ctl_info *mci) |
| { |
| debugf0("%s()\n", __func__); |
| |
| #ifdef CONFIG_EDAC_DEBUG |
| if (edac_debug_level >= 3) |
| edac_mc_dump_mci(mci); |
| |
| if (edac_debug_level >= 4) { |
| int i; |
| |
| for (i = 0; i < mci->nr_csrows; i++) { |
| int j; |
| |
| edac_mc_dump_csrow(&mci->csrows[i]); |
| for (j = 0; j < mci->csrows[i].nr_channels; j++) |
| edac_mc_dump_channel(&mci->csrows[i]. |
| channels[j]); |
| } |
| } |
| #endif |
| mutex_lock(&mem_ctls_mutex); |
| |
| if (add_mc_to_global_list(mci)) |
| goto fail0; |
| |
| /* set load time so that error rate can be tracked */ |
| mci->start_time = jiffies; |
| |
| if (edac_create_sysfs_mci_device(mci)) { |
| edac_mc_printk(mci, KERN_WARNING, |
| "failed to create sysfs device\n"); |
| goto fail1; |
| } |
| |
| /* If there IS a check routine, then we are running POLLED */ |
| if (mci->edac_check != NULL) { |
| /* This instance is NOW RUNNING */ |
| mci->op_state = OP_RUNNING_POLL; |
| |
| edac_mc_workq_setup(mci, edac_mc_get_poll_msec()); |
| } else { |
| mci->op_state = OP_RUNNING_INTERRUPT; |
| } |
| |
| /* Report action taken */ |
| edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':" |
| " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci)); |
| |
| mutex_unlock(&mem_ctls_mutex); |
| return 0; |
| |
| fail1: |
| del_mc_from_global_list(mci); |
| |
| fail0: |
| mutex_unlock(&mem_ctls_mutex); |
| return 1; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_add_mc); |
| |
| /** |
| * edac_mc_del_mc: Remove sysfs entries for specified mci structure and |
| * remove mci structure from global list |
| * @pdev: Pointer to 'struct device' representing mci structure to remove. |
| * |
| * Return pointer to removed mci structure, or NULL if device not found. |
| */ |
| struct mem_ctl_info *edac_mc_del_mc(struct device *dev) |
| { |
| struct mem_ctl_info *mci; |
| |
| debugf0("%s()\n", __func__); |
| |
| mutex_lock(&mem_ctls_mutex); |
| |
| /* find the requested mci struct in the global list */ |
| mci = find_mci_by_dev(dev); |
| if (mci == NULL) { |
| mutex_unlock(&mem_ctls_mutex); |
| return NULL; |
| } |
| |
| /* marking MCI offline */ |
| mci->op_state = OP_OFFLINE; |
| |
| del_mc_from_global_list(mci); |
| mutex_unlock(&mem_ctls_mutex); |
| |
| /* flush workq processes and remove sysfs */ |
| edac_mc_workq_teardown(mci); |
| edac_remove_sysfs_mci_device(mci); |
| |
| edac_printk(KERN_INFO, EDAC_MC, |
| "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, |
| mci->mod_name, mci->ctl_name, edac_dev_name(mci)); |
| |
| return mci; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_del_mc); |
| |
| static void edac_mc_scrub_block(unsigned long page, unsigned long offset, |
| u32 size) |
| { |
| struct page *pg; |
| void *virt_addr; |
| unsigned long flags = 0; |
| |
| debugf3("%s()\n", __func__); |
| |
| /* ECC error page was not in our memory. Ignore it. */ |
| if (!pfn_valid(page)) |
| return; |
| |
| /* Find the actual page structure then map it and fix */ |
| pg = pfn_to_page(page); |
| |
| if (PageHighMem(pg)) |
| local_irq_save(flags); |
| |
| virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); |
| |
| /* Perform architecture specific atomic scrub operation */ |
| atomic_scrub(virt_addr + offset, size); |
| |
| /* Unmap and complete */ |
| kunmap_atomic(virt_addr, KM_BOUNCE_READ); |
| |
| if (PageHighMem(pg)) |
| local_irq_restore(flags); |
| } |
| |
| /* FIXME - should return -1 */ |
| int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) |
| { |
| struct csrow_info *csrows = mci->csrows; |
| int row, i; |
| |
| debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); |
| row = -1; |
| |
| for (i = 0; i < mci->nr_csrows; i++) { |
| struct csrow_info *csrow = &csrows[i]; |
| |
| if (csrow->nr_pages == 0) |
| continue; |
| |
| debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " |
| "mask(0x%lx)\n", mci->mc_idx, __func__, |
| csrow->first_page, page, csrow->last_page, |
| csrow->page_mask); |
| |
| if ((page >= csrow->first_page) && |
| (page <= csrow->last_page) && |
| ((page & csrow->page_mask) == |
| (csrow->first_page & csrow->page_mask))) { |
| row = i; |
| break; |
| } |
| } |
| |
| if (row == -1) |
| edac_mc_printk(mci, KERN_ERR, |
| "could not look up page error address %lx\n", |
| (unsigned long)page); |
| |
| return row; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); |
| |
| /* FIXME - setable log (warning/emerg) levels */ |
| /* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ |
| void edac_mc_handle_ce(struct mem_ctl_info *mci, |
| unsigned long page_frame_number, |
| unsigned long offset_in_page, unsigned long syndrome, |
| int row, int channel, const char *msg) |
| { |
| unsigned long remapped_page; |
| |
| debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
| |
| /* FIXME - maybe make panic on INTERNAL ERROR an option */ |
| if (row >= mci->nr_csrows || row < 0) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: row out of range " |
| "(%d >= %d)\n", row, mci->nr_csrows); |
| edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| if (channel >= mci->csrows[row].nr_channels || channel < 0) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: channel out of range " |
| "(%d >= %d)\n", channel, |
| mci->csrows[row].nr_channels); |
| edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| if (edac_mc_get_log_ce()) |
| /* FIXME - put in DIMM location */ |
| edac_mc_printk(mci, KERN_WARNING, |
| "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " |
| "0x%lx, row %d, channel %d, label \"%s\": %s\n", |
| page_frame_number, offset_in_page, |
| mci->csrows[row].grain, syndrome, row, channel, |
| mci->csrows[row].channels[channel].label, msg); |
| |
| mci->ce_count++; |
| mci->csrows[row].ce_count++; |
| mci->csrows[row].channels[channel].ce_count++; |
| |
| if (mci->scrub_mode & SCRUB_SW_SRC) { |
| /* |
| * Some MC's can remap memory so that it is still available |
| * at a different address when PCI devices map into memory. |
| * MC's that can't do this lose the memory where PCI devices |
| * are mapped. This mapping is MC dependant and so we call |
| * back into the MC driver for it to map the MC page to |
| * a physical (CPU) page which can then be mapped to a virtual |
| * page - which can then be scrubbed. |
| */ |
| remapped_page = mci->ctl_page_to_phys ? |
| mci->ctl_page_to_phys(mci, page_frame_number) : |
| page_frame_number; |
| |
| edac_mc_scrub_block(remapped_page, offset_in_page, |
| mci->csrows[row].grain); |
| } |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_handle_ce); |
| |
| void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) |
| { |
| if (edac_mc_get_log_ce()) |
| edac_mc_printk(mci, KERN_WARNING, |
| "CE - no information available: %s\n", msg); |
| |
| mci->ce_noinfo_count++; |
| mci->ce_count++; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); |
| |
| void edac_mc_handle_ue(struct mem_ctl_info *mci, |
| unsigned long page_frame_number, |
| unsigned long offset_in_page, int row, const char *msg) |
| { |
| int len = EDAC_MC_LABEL_LEN * 4; |
| char labels[len + 1]; |
| char *pos = labels; |
| int chan; |
| int chars; |
| |
| debugf3("MC%d: %s()\n", mci->mc_idx, __func__); |
| |
| /* FIXME - maybe make panic on INTERNAL ERROR an option */ |
| if (row >= mci->nr_csrows || row < 0) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: row out of range " |
| "(%d >= %d)\n", row, mci->nr_csrows); |
| edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| chars = snprintf(pos, len + 1, "%s", |
| mci->csrows[row].channels[0].label); |
| len -= chars; |
| pos += chars; |
| |
| for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); |
| chan++) { |
| chars = snprintf(pos, len + 1, ":%s", |
| mci->csrows[row].channels[chan].label); |
| len -= chars; |
| pos += chars; |
| } |
| |
| if (edac_mc_get_log_ue()) |
| edac_mc_printk(mci, KERN_EMERG, |
| "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " |
| "labels \"%s\": %s\n", page_frame_number, |
| offset_in_page, mci->csrows[row].grain, row, |
| labels, msg); |
| |
| if (edac_mc_get_panic_on_ue()) |
| panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " |
| "row %d, labels \"%s\": %s\n", mci->mc_idx, |
| page_frame_number, offset_in_page, |
| mci->csrows[row].grain, row, labels, msg); |
| |
| mci->ue_count++; |
| mci->csrows[row].ue_count++; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_handle_ue); |
| |
| void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) |
| { |
| if (edac_mc_get_panic_on_ue()) |
| panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); |
| |
| if (edac_mc_get_log_ue()) |
| edac_mc_printk(mci, KERN_WARNING, |
| "UE - no information available: %s\n", msg); |
| mci->ue_noinfo_count++; |
| mci->ue_count++; |
| } |
| EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); |
| |
| /************************************************************* |
| * On Fully Buffered DIMM modules, this help function is |
| * called to process UE events |
| */ |
| void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci, |
| unsigned int csrow, |
| unsigned int channela, |
| unsigned int channelb, char *msg) |
| { |
| int len = EDAC_MC_LABEL_LEN * 4; |
| char labels[len + 1]; |
| char *pos = labels; |
| int chars; |
| |
| if (csrow >= mci->nr_csrows) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: row out of range (%d >= %d)\n", |
| csrow, mci->nr_csrows); |
| edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| if (channela >= mci->csrows[csrow].nr_channels) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: channel-a out of range " |
| "(%d >= %d)\n", |
| channela, mci->csrows[csrow].nr_channels); |
| edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| if (channelb >= mci->csrows[csrow].nr_channels) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: channel-b out of range " |
| "(%d >= %d)\n", |
| channelb, mci->csrows[csrow].nr_channels); |
| edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| mci->ue_count++; |
| mci->csrows[csrow].ue_count++; |
| |
| /* Generate the DIMM labels from the specified channels */ |
| chars = snprintf(pos, len + 1, "%s", |
| mci->csrows[csrow].channels[channela].label); |
| len -= chars; |
| pos += chars; |
| chars = snprintf(pos, len + 1, "-%s", |
| mci->csrows[csrow].channels[channelb].label); |
| |
| if (edac_mc_get_log_ue()) |
| edac_mc_printk(mci, KERN_EMERG, |
| "UE row %d, channel-a= %d channel-b= %d " |
| "labels \"%s\": %s\n", csrow, channela, channelb, |
| labels, msg); |
| |
| if (edac_mc_get_panic_on_ue()) |
| panic("UE row %d, channel-a= %d channel-b= %d " |
| "labels \"%s\": %s\n", csrow, channela, |
| channelb, labels, msg); |
| } |
| EXPORT_SYMBOL(edac_mc_handle_fbd_ue); |
| |
| /************************************************************* |
| * On Fully Buffered DIMM modules, this help function is |
| * called to process CE events |
| */ |
| void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci, |
| unsigned int csrow, unsigned int channel, char *msg) |
| { |
| |
| /* Ensure boundary values */ |
| if (csrow >= mci->nr_csrows) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: row out of range (%d >= %d)\n", |
| csrow, mci->nr_csrows); |
| edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| if (channel >= mci->csrows[csrow].nr_channels) { |
| /* something is wrong */ |
| edac_mc_printk(mci, KERN_ERR, |
| "INTERNAL ERROR: channel out of range (%d >= %d)\n", |
| channel, mci->csrows[csrow].nr_channels); |
| edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); |
| return; |
| } |
| |
| if (edac_mc_get_log_ce()) |
| /* FIXME - put in DIMM location */ |
| edac_mc_printk(mci, KERN_WARNING, |
| "CE row %d, channel %d, label \"%s\": %s\n", |
| csrow, channel, |
| mci->csrows[csrow].channels[channel].label, msg); |
| |
| mci->ce_count++; |
| mci->csrows[csrow].ce_count++; |
| mci->csrows[csrow].channels[channel].ce_count++; |
| } |
| EXPORT_SYMBOL(edac_mc_handle_fbd_ce); |