int __init opal_elog_init(void)
{
int rc = 0, irq;
/* ELOG not supported by firmware */
if (!opal_check_token(OPAL_ELOG_READ))
return -1;
elog_kset = kset_create_and_add("elog", NULL, opal_kobj);
if (!elog_kset) {
pr_warn("%s: failed to create elog kset\n", __func__);
return -1;
}
irq = opal_event_request(ilog2(OPAL_EVENT_ERROR_LOG_AVAIL));
if (!irq) {
pr_err("%s: Can't register OPAL event irq (%d)\n",
__func__, irq);
return irq;
}
rc = request_irq(irq, elog_event,
IRQ_TYPE_LEVEL_HIGH, "opal-elog", NULL);
if (rc) {
pr_err("%s: Can't request OPAL event irq (%d)\n",
__func__, rc);
return rc;
}
/* We are now ready to pull error logs from opal. */
if (opal_check_token(OPAL_ELOG_RESEND))
opal_resend_pending_logs();
return 0;
}
static int ipmi_powernv_probe(struct platform_device *pdev)
{
struct ipmi_smi_powernv *ipmi;
struct device *dev;
u32 prop;
int rc;
if (!pdev || !pdev->dev.of_node)
return -ENODEV;
dev = &pdev->dev;
ipmi = devm_kzalloc(dev, sizeof(*ipmi), GFP_KERNEL);
if (!ipmi)
return -ENOMEM;
spin_lock_init(&ipmi->msg_lock);
rc = of_property_read_u32(dev->of_node, "ibm,ipmi-interface-id",
&prop);
if (rc) {
dev_warn(dev, "No interface ID property\n");
goto err_free;
}
ipmi->interface_id = prop;
rc = of_property_read_u32(dev->of_node, "interrupts", &prop);
if (rc) {
dev_warn(dev, "No interrupts property\n");
goto err_free;
}
ipmi->irq = irq_of_parse_and_map(dev->of_node, 0);
if (!ipmi->irq) {
dev_info(dev, "Unable to map irq from device tree\n");
ipmi->irq = opal_event_request(prop);
}
if (request_irq(ipmi->irq, ipmi_opal_event, IRQ_TYPE_LEVEL_HIGH,
"opal-ipmi", ipmi)) {
dev_warn(dev, "Unable to request irq\n");
goto err_dispose;
}
ipmi->opal_msg = devm_kmalloc(dev,
sizeof(*ipmi->opal_msg) + IPMI_MAX_MSG_LENGTH,
GFP_KERNEL);
if (!ipmi->opal_msg) {
rc = -ENOMEM;
goto err_unregister;
}
/* todo: query actual ipmi_device_id */
rc = ipmi_register_smi(&ipmi_powernv_smi_handlers, ipmi,
&ipmi->ipmi_id, dev, 0);
if (rc) {
dev_warn(dev, "IPMI SMI registration failed (%d)\n", rc);
goto err_free_msg;
}
dev_set_drvdata(dev, ipmi);
return 0;
err_free_msg:
devm_kfree(dev, ipmi->opal_msg);
err_unregister:
free_irq(ipmi->irq, ipmi);
err_dispose:
irq_dispose_mapping(ipmi->irq);
err_free:
devm_kfree(dev, ipmi);
return rc;
}
