C++ debugf0函数代码示例

/*
 *
 * edac_pci_create_sysfs
 *
 *	Create the controls/attributes for the specified EDAC PCI device
 */
int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci)
{
	int err;
	struct kobject *edac_kobj = &pci->kobj;

	debugf0("%s() idx=%d\n", __func__, pci->pci_idx);

	/* create the top main EDAC PCI kobject, IF needed */
	err = edac_pci_main_kobj_setup();
	if (err)
		return err;

	/* Create this instance's kobject under the MAIN kobject */
	err = edac_pci_create_instance_kobj(pci, pci->pci_idx);
	if (err)
		goto unregister_cleanup;

	err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK);
	if (err) {
		debugf0("%s() sysfs_create_link() returned err= %d\n",
			__func__, err);
		goto symlink_fail;
	}

	return 0;

	/* Error unwind stack */
symlink_fail:
	edac_pci_unregister_sysfs_instance_kobj(pci);

unregister_cleanup:
	edac_pci_main_kobj_teardown();

	return err;
}

/*
 * edac_device_create_sysfs() Constructor
 *
 * accept a created edac_device control structure
 * and 'export' it to sysfs. The 'main' kobj should already have been
 * created. 'instance' and 'block' kobjects should be registered
 * along with any 'block' attributes from the low driver. In addition,
 * the main attributes (if any) are connected to the main kobject of
 * the control structure.
 *
 * Return:
 *	0	Success
 *	!0	Failure
 */
int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
{
	int err;
	struct kobject *edac_kobj = &edac_dev->kobj;

	debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx);

	/*  go create any main attributes callers wants */
	err = edac_device_add_main_sysfs_attributes(edac_dev);
	if (err) {
		debugf0("%s() failed to add sysfs attribs\n", __func__);
		goto err_out;
	}

	/* create a symlink from the edac device
	 * to the platform 'device' being used for this
	 */
	err = sysfs_create_link(edac_kobj,
				&edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK);
	if (err) {
		debugf0("%s() sysfs_create_link() returned err= %d\n",
			__func__, err);
		goto err_remove_main_attribs;
	}

	/* Create the first level instance directories
	 * In turn, the nested blocks beneath the instances will
	 * be registered as well
	 */
	err = edac_device_create_instances(edac_dev);
	if (err) {
		debugf0("%s() edac_device_create_instances() "
			"returned err= %d\n", __func__, err);
		goto err_remove_link;
	}


	debugf4("%s() create-instances done, idx=%d\n",
		__func__, edac_dev->dev_idx);

	return 0;

	/* Error unwind stack */
err_remove_link:
	/* remove the sym link */
	sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);

err_remove_main_attribs:
	edac_device_remove_main_sysfs_attributes(edac_dev);

err_out:
	return err;
}

static int how_many_channels(struct pci_dev *pdev)
{
	unsigned char capid0_8b; /* 8th byte of CAPID0 */

	pci_read_config_byte(pdev, I3200_CAPID0 + 8, &capid0_8b);
	if (capid0_8b & 0x20) { /* check DCD: Dual Channel Disable */
		debugf0("In single channel mode.\n");
		return 1;
	} else {
		debugf0("In dual channel mode.\n");
		return 2;
	}
}

/*
 * edac_pci_main_kobj_teardown()
 *
 *	if no longer linked (needed) remove the top level EDAC PCI
 *	kobject with its controls and attributes
 */
static void edac_pci_main_kobj_teardown(void)
{
	debugf0("%s()\n", __func__);

	/* Decrement the count and only if no more controller instances
	 * are connected perform the unregisteration of the top level
	 * main kobj
	 */
	if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) {
		debugf0("%s() called kobject_put on main kobj\n",
			__func__);
		kobject_put(edac_pci_top_main_kobj);
	}
}

/*
 * Do a DRAM ECC write. Assemble staged values in the pvt area and format into
 * fields needed by the injection registers.
 */
static ssize_t amd64_inject_write_store(struct mem_ctl_info *mci,
					const char *data, size_t count)
{
	struct amd64_pvt *pvt = mci->pvt_info;
	unsigned long value;
	u32 section, word_bits;
	int ret = 0;

	ret = strict_strtoul(data, 10, &value);
	if (ret != -EINVAL) {

		/* Form value to choose 16-byte section of cacheline */
		section = F10_NB_ARRAY_DRAM_ECC |
				SET_NB_ARRAY_ADDRESS(pvt->injection.section);
		pci_write_config_dword(pvt->misc_f3_ctl,
					F10_NB_ARRAY_ADDR, section);

		word_bits = SET_NB_DRAM_INJECTION_WRITE(pvt->injection.word,
						pvt->injection.bit_map);

		/* Issue 'word' and 'bit' along with the READ request */
		pci_write_config_dword(pvt->misc_f3_ctl,
					F10_NB_ARRAY_DATA, word_bits);

		debugf0("section=0x%x word_bits=0x%x\n", section, word_bits);

		return count;
	}
	return ret;
}

static void edac_sysfs_pci_teardown(void)
{
	debugf0("%s()\n", __func__);
	init_completion(&edac_pci_kobj_complete);
	kobject_unregister(&edac_pci_kobj);
	wait_for_completion(&edac_pci_kobj_complete);
}

/*
 * edac_pci_remove_sysfs
 *
 *	remove the controls and attributes for this EDAC PCI device
 */
void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci)
{
	debugf0("%s() index=%d\n", __func__, pci->pci_idx);

	/* Remove the symlink */
	sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK);

	/* remove this PCI instance's sysfs entries */
	edac_pci_unregister_sysfs_instance_kobj(pci);

	/* Call the main unregister function, which will determine
	 * if this 'pci' is the last instance.
	 * If it is, the main kobject will be unregistered as a result
	 */
	debugf0("%s() calling edac_pci_main_kobj_teardown()\n", __func__);
	edac_pci_main_kobj_teardown();
}

/* returns count (>= 0), or negative on error */
static int __devinit r82600_init_one(struct pci_dev *pdev,
				const struct pci_device_id *ent)
{
	debugf0("%s()\n", __func__);

	/* don't need to call pci_enable_device() */
	return r82600_probe1(pdev, ent->driver_data);
}

/*
 * edac_exit()
 *      module exit/termination function
 */
static void __exit edac_exit(void)
{
	debugf0("%s()\n", __func__);

	/* tear down the various subsystems */
	edac_workqueue_teardown();
	edac_sysfs_teardown_mc_kset();
}

int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
{
	int err;
	struct kobject *edac_kobj = &edac_dev->kobj;

	debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx);

	
	err = edac_device_add_main_sysfs_attributes(edac_dev);
	if (err) {
		debugf0("%s() failed to add sysfs attribs\n", __func__);
		goto err_out;
	}

	err = sysfs_create_link(edac_kobj,
				&edac_dev->dev->kobj, EDAC_DEVICE_SYMLINK);
	if (err) {
		debugf0("%s() sysfs_create_link() returned err= %d\n",
			__func__, err);
		goto err_remove_main_attribs;
	}

	err = edac_device_create_instances(edac_dev);
	if (err) {
		debugf0("%s() edac_device_create_instances() "
			"returned err= %d\n", __func__, err);
		goto err_remove_link;
	}


	debugf4("%s() create-instances done, idx=%d\n",
		__func__, edac_dev->dev_idx);

	return 0;

	
err_remove_link:
	
	sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);

err_remove_main_attribs:
	edac_device_remove_main_sysfs_attributes(edac_dev);

err_out:
	return err;
}

void edac_device_unregister_sysfs_main_kobj(struct edac_device_ctl_info *dev)
{
	debugf0("%s()\n", __func__);
	debugf4("%s() name of kobject is: %s\n",
		__func__, kobject_name(&dev->kobj));

	kobject_put(&dev->kobj);
	edac_put_sysfs_subsys();
}

/*
 * edac_pci_unregister_sysfs_instance_kobj
 *
 *	unregister the kobj for the EDAC PCI instance
 */
static void edac_pci_unregister_sysfs_instance_kobj(
			struct edac_pci_ctl_info *pci)
{
	debugf0("%s()\n", __func__);

	/* Unregister the instance kobject and allow its release
	 * function release the main reference count and then
	 * kfree the memory
	 */
	kobject_put(&pci->kobj);
}

/*
 * edac_pci_release_main_kobj
 *
 *	This release function is called when the reference count to the
 *	passed kobj goes to zero.
 *
 *	This kobj is the 'main' kobject that EDAC PCI instances
 *	link to, and thus provide for proper nesting counts
 */
static void edac_pci_release_main_kobj(struct kobject *kobj)
{
	debugf0("%s() here to module_put(THIS_MODULE)\n", __func__);

	kfree(kobj);

	/* last reference to top EDAC PCI kobject has been removed,
	 * NOW release our ref count on the core module
	 */
	module_put(THIS_MODULE);
}

static void __devexit r82600_remove_one(struct pci_dev *pdev)
{
	struct mem_ctl_info *mci;

	debugf0("%s()\n", __func__);

	if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
		return;

	edac_mc_free(mci);
}

/*
 * edac_device_remove_sysfs() destructor
 *
 * given an edac_device struct, tear down the kobject resources
 */
void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev)
{
	debugf0("%s()\n", __func__);

	/* remove any main attributes for this device */
	edac_device_remove_main_sysfs_attributes(edac_dev);

	/* remove the device sym link */
	sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);

	/* walk the instance/block kobject tree, deconstructing it */
	edac_device_delete_instances(edac_dev);
}