--- /dev/null
+
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com>
+ *
+ * This driver is based on code originally written by Pete Reynolds
+ * and others.
+ *
+ */
+
+/*
+ * The ASM device driver does the following things:
+ *
+ * 1) When loaded it sends a message to the service processor,
+ * indicating that an OS is * running. This causes the service processor
+ * to send periodic heartbeats to the OS.
+ *
+ * 2) Answers the periodic heartbeats sent by the service processor.
+ * Failure to do so would result in system reboot.
+ *
+ * 3) Acts as a pass through for dot commands sent from user applications.
+ * The interface for this is the ibmasmfs file system.
+ *
+ * 4) Allows user applications to register for event notification. Events
+ * are sent to the driver through interrupts. They can be read from user
+ * space through the ibmasmfs file system.
+ *
+ * 5) Allows user space applications to send heartbeats to the service
+ * processor (aka reverse heartbeats). Again this happens through ibmasmfs.
+ *
+ * 6) Handles remote mouse and keyboard event interrupts and makes them
+ * available to user applications through ibmasmfs.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include "ibmasm.h"
+#include "lowlevel.h"
+#include "remote.h"
+
+int ibmasm_debug = 0;
+module_param(ibmasm_debug, int , S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ibmasm_debug, " Set debug mode on or off");
+
+
+static int ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int result;
+ struct service_processor *sp;
+
+ if ((result = pci_enable_device(pdev))) {
+ dev_err(&pdev->dev, "Failed to enable PCI device\n");
+ return result;
+ }
+ if ((result = pci_request_regions(pdev, DRIVER_NAME))) {
+ dev_err(&pdev->dev, "Failed to allocate PCI resources\n");
+ goto error_resources;
+ }
+ /* vnc client won't work without bus-mastering */
+ pci_set_master(pdev);
+
+ sp = kzalloc(sizeof(struct service_processor), GFP_KERNEL);
+ if (sp == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory\n");
+ result = -ENOMEM;
+ goto error_kmalloc;
+ }
+
+ spin_lock_init(&sp->lock);
+ INIT_LIST_HEAD(&sp->command_queue);
+
+ pci_set_drvdata(pdev, (void *)sp);
+ sp->dev = &pdev->dev;
+ sp->number = pdev->bus->number;
+ snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number);
+ snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number);
+
+ if (ibmasm_event_buffer_init(sp)) {
+ dev_err(sp->dev, "Failed to allocate event buffer\n");
+ goto error_eventbuffer;
+ }
+
+ if (ibmasm_heartbeat_init(sp)) {
+ dev_err(sp->dev, "Failed to allocate heartbeat command\n");
+ goto error_heartbeat;
+ }
+
+ sp->irq = pdev->irq;
+ sp->base_address = pci_ioremap_bar(pdev, 0);
+ if (!sp->base_address) {
+ dev_err(sp->dev, "Failed to ioremap pci memory\n");
+ result = -ENODEV;
+ goto error_ioremap;
+ }
+
+ result = request_irq(sp->irq, ibmasm_interrupt_handler, IRQF_SHARED, sp->devname, (void*)sp);
+ if (result) {
+ dev_err(sp->dev, "Failed to register interrupt handler\n");
+ goto error_request_irq;
+ }
+
+ enable_sp_interrupts(sp->base_address);
+
+ result = ibmasm_init_remote_input_dev(sp);
+ if (result) {
+ dev_err(sp->dev, "Failed to initialize remote queue\n");
+ goto error_send_message;
+ }
+
+ result = ibmasm_send_driver_vpd(sp);
+ if (result) {
+ dev_err(sp->dev, "Failed to send driver VPD to service processor\n");
+ goto error_send_message;
+ }
+ result = ibmasm_send_os_state(sp, SYSTEM_STATE_OS_UP);
+ if (result) {
+ dev_err(sp->dev, "Failed to send OS state to service processor\n");
+ goto error_send_message;
+ }
+ ibmasmfs_add_sp(sp);
+
+ ibmasm_register_uart(sp);
+
+ return 0;
+
+error_send_message:
+ disable_sp_interrupts(sp->base_address);
+ ibmasm_free_remote_input_dev(sp);
+ free_irq(sp->irq, (void *)sp);
+error_request_irq:
+ iounmap(sp->base_address);
+error_ioremap:
+ ibmasm_heartbeat_exit(sp);
+error_heartbeat:
+ ibmasm_event_buffer_exit(sp);
+error_eventbuffer:
+ kfree(sp);
+error_kmalloc:
+ pci_release_regions(pdev);
+error_resources:
+ pci_disable_device(pdev);
+
+ return result;
+}
+
+static void ibmasm_remove_one(struct pci_dev *pdev)
+{
+ struct service_processor *sp = pci_get_drvdata(pdev);
+
+ dbg("Unregistering UART\n");
+ ibmasm_unregister_uart(sp);
+ dbg("Sending OS down message\n");
+ if (ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN))
+ err("failed to get repsonse to 'Send OS State' command\n");
+ dbg("Disabling heartbeats\n");
+ ibmasm_heartbeat_exit(sp);
+ dbg("Disabling interrupts\n");
+ disable_sp_interrupts(sp->base_address);
+ dbg("Freeing SP irq\n");
+ free_irq(sp->irq, (void *)sp);
+ dbg("Cleaning up\n");
+ ibmasm_free_remote_input_dev(sp);
+ iounmap(sp->base_address);
+ ibmasm_event_buffer_exit(sp);
+ kfree(sp);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+static struct pci_device_id ibmasm_pci_table[] =
+{
+ { PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) },
+ {},
+};
+
+static struct pci_driver ibmasm_driver = {
+ .name = DRIVER_NAME,
+ .id_table = ibmasm_pci_table,
+ .probe = ibmasm_init_one,
+ .remove = ibmasm_remove_one,
+};
+
+static void __exit ibmasm_exit (void)
+{
+ ibmasm_unregister_panic_notifier();
+ ibmasmfs_unregister();
+ pci_unregister_driver(&ibmasm_driver);
+ info(DRIVER_DESC " version " DRIVER_VERSION " unloaded");
+}
+
+static int __init ibmasm_init(void)
+{
+ int result = pci_register_driver(&ibmasm_driver);
+ if (result)
+ return result;
+
+ result = ibmasmfs_register();
+ if (result) {
+ pci_unregister_driver(&ibmasm_driver);
+ err("Failed to register ibmasmfs file system");
+ return result;
+ }
+
+ ibmasm_register_panic_notifier();
+ info(DRIVER_DESC " version " DRIVER_VERSION " loaded");
+ return 0;
+}
+
+module_init(ibmasm_init);
+module_exit(ibmasm_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ibmasm_pci_table);
+
Code Review / kvmfornfv.git / blobdiff