zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/edac/edac_mc.c b/ap/os/linux/linux-3.4.x/drivers/edac/edac_mc.c
new file mode 100644
index 0000000..feef773
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/edac/edac_mc.c
@@ -0,0 +1,918 @@
+/*
+ * 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/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 rank_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 */
+
+/*
+ * keep those in sync with the enum mem_type
+ */
+const char *edac_mem_types[] = {
+ "Empty csrow",
+ "Reserved csrow type",
+ "Unknown csrow type",
+ "Fast page mode RAM",
+ "Extended data out RAM",
+ "Burst Extended data out RAM",
+ "Single data rate SDRAM",
+ "Registered single data rate SDRAM",
+ "Double data rate SDRAM",
+ "Registered Double data rate SDRAM",
+ "Rambus DRAM",
+ "Unbuffered DDR2 RAM",
+ "Fully buffered DDR2",
+ "Registered DDR2 RAM",
+ "Rambus XDR",
+ "Unbuffered DDR3 RAM",
+ "Registered DDR3 RAM",
+};
+EXPORT_SYMBOL_GPL(edac_mem_types);
+
+/* '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 rank_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 rank_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;
+ INIT_LIST_HEAD(&mci->grp_kobj_list);
+
+ /*
+ * 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)
+{
+ debugf1("%s()\n", __func__);
+
+ edac_mc_unregister_sysfs_main_kobj(mci);
+
+ /* free the mci instance memory here */
+ kfree(mci);
+}
+EXPORT_SYMBOL_GPL(edac_mc_free);
+
+
+/**
+ * find_mci_by_dev
+ *
+ * scan list of controllers looking for the one that manages
+ * the 'dev' device
+ * @dev: pointer to a struct device related with the MCI
+ */
+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;
+}
+EXPORT_SYMBOL_GPL(find_mci_by_dev);
+
+/*
+ * 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;
+
+ if (mci->op_state != OP_RUNNING_POLL)
+ return;
+
+ 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 del_mc_from_global_list(struct mem_ctl_info *mci)
+{
+ atomic_dec(&edac_handlers);
+ list_del_rcu(&mci->link);
+
+ /* these are for safe removal of devices from global list while
+ * NMI handlers may be traversing list
+ */
+ synchronize_rcu();
+ INIT_LIST_HEAD(&mci->link);
+}
+
+/**
+ * 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;
+ }
+
+ del_mc_from_global_list(mci);
+ mutex_unlock(&mem_ctls_mutex);
+
+ /* flush workq processes */
+ edac_mc_workq_teardown(mci);
+
+ /* marking MCI offline */
+ mci->op_state = OP_OFFLINE;
+
+ /* remove from sysfs */
+ 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);
+
+ /* Perform architecture specific atomic scrub operation */
+ atomic_scrub(virt_addr + offset, size);
+
+ /* Unmap and complete */
+ kunmap_atomic(virt_addr);
+
+ 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 dependent 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);