diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/edac/edac_pci.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/edac/edac_pci.c | 499 |
1 files changed, 0 insertions, 499 deletions
diff --git a/ANDROID_3.4.5/drivers/edac/edac_pci.c b/ANDROID_3.4.5/drivers/edac/edac_pci.c deleted file mode 100644 index 63af1c56..00000000 --- a/ANDROID_3.4.5/drivers/edac/edac_pci.c +++ /dev/null @@ -1,499 +0,0 @@ -/* - * EDAC PCI component - * - * Author: Dave Jiang <djiang@mvista.com> - * - * 2007 (c) MontaVista Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - * - */ -#include <linux/module.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/spinlock.h> -#include <linux/list.h> -#include <linux/ctype.h> -#include <linux/workqueue.h> -#include <asm/uaccess.h> -#include <asm/page.h> - -#include "edac_core.h" -#include "edac_module.h" - -static DEFINE_MUTEX(edac_pci_ctls_mutex); -static LIST_HEAD(edac_pci_list); -static atomic_t pci_indexes = ATOMIC_INIT(0); - -/* - * edac_pci_alloc_ctl_info - * - * The alloc() function for the 'edac_pci' control info - * structure. The chip driver will allocate one of these for each - * edac_pci it is going to control/register with the EDAC CORE. - */ -struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt, - const char *edac_pci_name) -{ - struct edac_pci_ctl_info *pci; - void *pvt; - unsigned int size; - - debugf1("%s()\n", __func__); - - pci = (struct edac_pci_ctl_info *)0; - pvt = edac_align_ptr(&pci[1], sz_pvt); - size = ((unsigned long)pvt) + sz_pvt; - - /* Alloc the needed control struct memory */ - pci = kzalloc(size, GFP_KERNEL); - if (pci == NULL) - return NULL; - - /* Now much private space */ - pvt = sz_pvt ? ((char *)pci) + ((unsigned long)pvt) : NULL; - - pci->pvt_info = pvt; - pci->op_state = OP_ALLOC; - - snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name); - - return pci; -} -EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info); - -/* - * edac_pci_free_ctl_info() - * - * Last action on the pci control structure. - * - * call the remove sysfs information, which will unregister - * this control struct's kobj. When that kobj's ref count - * goes to zero, its release function will be call and then - * kfree() the memory. - */ -void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci) -{ - debugf1("%s()\n", __func__); - - edac_pci_remove_sysfs(pci); -} -EXPORT_SYMBOL_GPL(edac_pci_free_ctl_info); - -/* - * find_edac_pci_by_dev() - * scans the edac_pci list for a specific 'struct device *' - * - * return NULL if not found, or return control struct pointer - */ -static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev) -{ - struct edac_pci_ctl_info *pci; - struct list_head *item; - - debugf1("%s()\n", __func__); - - list_for_each(item, &edac_pci_list) { - pci = list_entry(item, struct edac_pci_ctl_info, link); - - if (pci->dev == dev) - return pci; - } - - return NULL; -} - -/* - * add_edac_pci_to_global_list - * Before calling this function, caller must assign a unique value to - * edac_dev->pci_idx. - * Return: - * 0 on success - * 1 on failure - */ -static int add_edac_pci_to_global_list(struct edac_pci_ctl_info *pci) -{ - struct list_head *item, *insert_before; - struct edac_pci_ctl_info *rover; - - debugf1("%s()\n", __func__); - - insert_before = &edac_pci_list; - - /* Determine if already on the list */ - rover = find_edac_pci_by_dev(pci->dev); - if (unlikely(rover != NULL)) - goto fail0; - - /* Insert in ascending order by 'pci_idx', so find position */ - list_for_each(item, &edac_pci_list) { - rover = list_entry(item, struct edac_pci_ctl_info, link); - - if (rover->pci_idx >= pci->pci_idx) { - if (unlikely(rover->pci_idx == pci->pci_idx)) - goto fail1; - - insert_before = item; - break; - } - } - - list_add_tail_rcu(&pci->link, insert_before); - return 0; - -fail0: - edac_printk(KERN_WARNING, EDAC_PCI, - "%s (%s) %s %s already assigned %d\n", - dev_name(rover->dev), edac_dev_name(rover), - rover->mod_name, rover->ctl_name, rover->pci_idx); - return 1; - -fail1: - edac_printk(KERN_WARNING, EDAC_PCI, - "but in low-level driver: attempt to assign\n" - "\tduplicate pci_idx %d in %s()\n", rover->pci_idx, - __func__); - return 1; -} - -/* - * del_edac_pci_from_global_list - * - * remove the PCI control struct from the global list - */ -static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci) -{ - list_del_rcu(&pci->link); - - /* these are for safe removal of devices from global list while - * NMI handlers may be traversing list - */ - synchronize_rcu(); - INIT_LIST_HEAD(&pci->link); -} - -#if 0 -/* Older code, but might use in the future */ - -/* - * edac_pci_find() - * Search for an edac_pci_ctl_info structure whose index is 'idx' - * - * If found, return a pointer to the structure - * Else return NULL. - * - * Caller must hold pci_ctls_mutex. - */ -struct edac_pci_ctl_info *edac_pci_find(int idx) -{ - struct list_head *item; - struct edac_pci_ctl_info *pci; - - /* Iterage over list, looking for exact match of ID */ - list_for_each(item, &edac_pci_list) { - pci = list_entry(item, struct edac_pci_ctl_info, link); - - if (pci->pci_idx >= idx) { - if (pci->pci_idx == idx) - return pci; - - /* not on list, so terminate early */ - break; - } - } - - return NULL; -} -EXPORT_SYMBOL_GPL(edac_pci_find); -#endif - -/* - * edac_pci_workq_function() - * - * periodic function that performs the operation - * scheduled by a workq request, for a given PCI control struct - */ -static void edac_pci_workq_function(struct work_struct *work_req) -{ - struct delayed_work *d_work = to_delayed_work(work_req); - struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work); - int msec; - unsigned long delay; - - debugf3("%s() checking\n", __func__); - - mutex_lock(&edac_pci_ctls_mutex); - - if (pci->op_state == OP_RUNNING_POLL) { - /* we might be in POLL mode, but there may NOT be a poll func - */ - if ((pci->edac_check != NULL) && edac_pci_get_check_errors()) - pci->edac_check(pci); - - /* if we are on a one second period, then use round */ - msec = edac_pci_get_poll_msec(); - if (msec == 1000) - delay = round_jiffies_relative(msecs_to_jiffies(msec)); - else - delay = msecs_to_jiffies(msec); - - /* Reschedule only if we are in POLL mode */ - queue_delayed_work(edac_workqueue, &pci->work, delay); - } - - mutex_unlock(&edac_pci_ctls_mutex); -} - -/* - * edac_pci_workq_setup() - * initialize a workq item for this edac_pci instance - * passing in the new delay period in msec - * - * locking model: - * called when 'edac_pci_ctls_mutex' is locked - */ -static void edac_pci_workq_setup(struct edac_pci_ctl_info *pci, - unsigned int msec) -{ - debugf0("%s()\n", __func__); - - INIT_DELAYED_WORK(&pci->work, edac_pci_workq_function); - queue_delayed_work(edac_workqueue, &pci->work, - msecs_to_jiffies(edac_pci_get_poll_msec())); -} - -/* - * edac_pci_workq_teardown() - * stop the workq processing on this edac_pci instance - */ -static void edac_pci_workq_teardown(struct edac_pci_ctl_info *pci) -{ - int status; - - debugf0("%s()\n", __func__); - - status = cancel_delayed_work(&pci->work); - if (status == 0) - flush_workqueue(edac_workqueue); -} - -/* - * edac_pci_reset_delay_period - * - * called with a new period value for the workq period - * a) stop current workq timer - * b) restart workq timer with new value - */ -void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci, - unsigned long value) -{ - debugf0("%s()\n", __func__); - - edac_pci_workq_teardown(pci); - - /* need to lock for the setup */ - mutex_lock(&edac_pci_ctls_mutex); - - edac_pci_workq_setup(pci, value); - - mutex_unlock(&edac_pci_ctls_mutex); -} -EXPORT_SYMBOL_GPL(edac_pci_reset_delay_period); - -/* - * edac_pci_alloc_index: Allocate a unique PCI index number - * - * Return: - * allocated index number - * - */ -int edac_pci_alloc_index(void) -{ - return atomic_inc_return(&pci_indexes) - 1; -} -EXPORT_SYMBOL_GPL(edac_pci_alloc_index); - -/* - * edac_pci_add_device: Insert the 'edac_dev' structure into the - * edac_pci global list and create sysfs entries associated with - * edac_pci structure. - * @pci: pointer to the edac_device structure to be added to the list - * @edac_idx: A unique numeric identifier to be assigned to the - * 'edac_pci' structure. - * - * Return: - * 0 Success - * !0 Failure - */ -int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx) -{ - debugf0("%s()\n", __func__); - - pci->pci_idx = edac_idx; - pci->start_time = jiffies; - - mutex_lock(&edac_pci_ctls_mutex); - - if (add_edac_pci_to_global_list(pci)) - goto fail0; - - if (edac_pci_create_sysfs(pci)) { - edac_pci_printk(pci, KERN_WARNING, - "failed to create sysfs pci\n"); - goto fail1; - } - - if (pci->edac_check != NULL) { - pci->op_state = OP_RUNNING_POLL; - - edac_pci_workq_setup(pci, 1000); - } else { - pci->op_state = OP_RUNNING_INTERRUPT; - } - - edac_pci_printk(pci, KERN_INFO, - "Giving out device to module '%s' controller '%s':" - " DEV '%s' (%s)\n", - pci->mod_name, - pci->ctl_name, - edac_dev_name(pci), edac_op_state_to_string(pci->op_state)); - - mutex_unlock(&edac_pci_ctls_mutex); - return 0; - - /* error unwind stack */ -fail1: - del_edac_pci_from_global_list(pci); -fail0: - mutex_unlock(&edac_pci_ctls_mutex); - return 1; -} -EXPORT_SYMBOL_GPL(edac_pci_add_device); - -/* - * edac_pci_del_device() - * Remove sysfs entries for specified edac_pci structure and - * then remove edac_pci structure from global list - * - * @dev: - * Pointer to 'struct device' representing edac_pci structure - * to remove - * - * Return: - * Pointer to removed edac_pci structure, - * or NULL if device not found - */ -struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev) -{ - struct edac_pci_ctl_info *pci; - - debugf0("%s()\n", __func__); - - mutex_lock(&edac_pci_ctls_mutex); - - /* ensure the control struct is on the global list - * if not, then leave - */ - pci = find_edac_pci_by_dev(dev); - if (pci == NULL) { - mutex_unlock(&edac_pci_ctls_mutex); - return NULL; - } - - pci->op_state = OP_OFFLINE; - - del_edac_pci_from_global_list(pci); - - mutex_unlock(&edac_pci_ctls_mutex); - - /* stop the workq timer */ - edac_pci_workq_teardown(pci); - - edac_printk(KERN_INFO, EDAC_PCI, - "Removed device %d for %s %s: DEV %s\n", - pci->pci_idx, pci->mod_name, pci->ctl_name, edac_dev_name(pci)); - - return pci; -} -EXPORT_SYMBOL_GPL(edac_pci_del_device); - -/* - * edac_pci_generic_check - * - * a Generic parity check API - */ -static void edac_pci_generic_check(struct edac_pci_ctl_info *pci) -{ - debugf4("%s()\n", __func__); - edac_pci_do_parity_check(); -} - -/* free running instance index counter */ -static int edac_pci_idx; -#define EDAC_PCI_GENCTL_NAME "EDAC PCI controller" - -struct edac_pci_gen_data { - int edac_idx; -}; - -/* - * edac_pci_create_generic_ctl - * - * A generic constructor for a PCI parity polling device - * Some systems have more than one domain of PCI busses. - * For systems with one domain, then this API will - * provide for a generic poller. - * - * This routine calls the edac_pci_alloc_ctl_info() for - * the generic device, with default values - */ -struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev, - const char *mod_name) -{ - struct edac_pci_ctl_info *pci; - struct edac_pci_gen_data *pdata; - - pci = edac_pci_alloc_ctl_info(sizeof(*pdata), EDAC_PCI_GENCTL_NAME); - if (!pci) - return NULL; - - pdata = pci->pvt_info; - pci->dev = dev; - dev_set_drvdata(pci->dev, pci); - pci->dev_name = pci_name(to_pci_dev(dev)); - - pci->mod_name = mod_name; - pci->ctl_name = EDAC_PCI_GENCTL_NAME; - pci->edac_check = edac_pci_generic_check; - - pdata->edac_idx = edac_pci_idx++; - - if (edac_pci_add_device(pci, pdata->edac_idx) > 0) { - debugf3("%s(): failed edac_pci_add_device()\n", __func__); - edac_pci_free_ctl_info(pci); - return NULL; - } - - return pci; -} -EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl); - -/* - * edac_pci_release_generic_ctl - * - * The release function of a generic EDAC PCI polling device - */ -void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci) -{ - debugf0("%s() pci mod=%s\n", __func__, pci->mod_name); - - edac_pci_del_device(pci->dev); - edac_pci_free_ctl_info(pci); -} -EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl); 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