diff options
Diffstat (limited to 'drivers/staging/unisys/virtpci/virtpci.c')
| -rw-r--r-- | drivers/staging/unisys/virtpci/virtpci.c | 1394 |
1 files changed, 0 insertions, 1394 deletions
diff --git a/drivers/staging/unisys/virtpci/virtpci.c b/drivers/staging/unisys/virtpci/virtpci.c deleted file mode 100644 index d5ad01783..000000000 --- a/drivers/staging/unisys/virtpci/virtpci.c +++ /dev/null @@ -1,1394 +0,0 @@ -/* virtpci.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * 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, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#define EXPORT_SYMTAB - -#include <linux/kernel.h> -#ifdef CONFIG_MODVERSIONS -#include <config/modversions.h> -#endif -#include "diagnostics/appos_subsystems.h" -#include "uisutils.h" -#include "vbuschannel.h" -#include "vbushelper.h" -#include <linux/types.h> -#include <linux/io.h> -#include <linux/uuid.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/device.h> -#include <linux/list.h> -#include <linux/slab.h> -#include <linux/mod_devicetable.h> -#include <linux/if_ether.h> -#include <linux/version.h> -#include <linux/debugfs.h> -#include "version.h" -#include "guestlinuxdebug.h" -#include "timskmod.h" - -struct driver_private { - struct kobject kobj; - struct klist klist_devices; - struct klist_node knode_bus; - struct module_kobject *mkobj; - struct device_driver *driver; -}; - -#define to_driver(obj) container_of(obj, struct driver_private, kobj) - -/* bus_id went away in 2.6.30 - the size was 20 bytes, so we'll define - * it ourselves, and a macro to make getting the field a bit simpler. - */ -#ifndef BUS_ID_SIZE -#define BUS_ID_SIZE 20 -#endif - -#define BUS_ID(x) dev_name(x) - -/* MAX_BUF = 4 busses x ( 32 devices/bus + 1 busline) x 80 characters - * = 10,560 bytes ~ 2^14 = 16,384 bytes - */ -#define MAX_BUF 16384 - -#include "virtpci.h" - -/* this is shorter than using __FILE__ (full path name) in - * debug/info/error messages - */ -#define CURRENT_FILE_PC VIRT_PCI_PC_virtpci_c -#define __MYFILE__ "virtpci.c" - -#define VIRTPCI_VERSION "01.00" - -/*****************************************************/ -/* Forward declarations */ -/*****************************************************/ - -static int delete_vbus_device(struct device *vbus, void *data); -static int match_busid(struct device *dev, void *data); -static void virtpci_bus_release(struct device *dev); -static void virtpci_device_release(struct device *dev); -static int virtpci_device_add(struct device *parentbus, int devtype, - struct add_virt_guestpart *addparams, - struct scsi_adap_info *scsi, - struct net_adap_info *net); -static int virtpci_device_del(struct device *parentbus, int devtype, - struct vhba_wwnn *wwnn, unsigned char macaddr[]); -static int virtpci_device_serverdown(struct device *parentbus, int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]); -static int virtpci_device_serverup(struct device *parentbus, int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]); -static ssize_t virtpci_driver_attr_show(struct kobject *kobj, - struct attribute *attr, char *buf); -static ssize_t virtpci_driver_attr_store(struct kobject *kobj, - struct attribute *attr, - const char *buf, size_t count); -static int virtpci_bus_match(struct device *dev, struct device_driver *drv); -static int virtpci_uevent(struct device *dev, struct kobj_uevent_env *env); -static int virtpci_device_probe(struct device *dev); -static int virtpci_device_remove(struct device *dev); - -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset); - -static const struct file_operations debugfs_info_fops = { - .read = info_debugfs_read, -}; - -/*****************************************************/ -/* Globals */ -/*****************************************************/ - -/* methods in bus_type struct allow the bus code to serve as an - * intermediary between the device core and individual device core and - * individual drivers - */ -static struct bus_type virtpci_bus_type = { - .name = "uisvirtpci", - .match = virtpci_bus_match, - .uevent = virtpci_uevent, -}; - -static struct device virtpci_rootbus_device = { - .init_name = "vbusroot", /* root bus */ - .release = virtpci_bus_release -}; - -/* filled in with info about parent chipset driver when we register with it */ -static struct ultra_vbus_deviceinfo chipset_driver_info; - -static const struct sysfs_ops virtpci_driver_sysfs_ops = { - .show = virtpci_driver_attr_show, - .store = virtpci_driver_attr_store, -}; - -static struct kobj_type virtpci_driver_kobj_type = { - .sysfs_ops = &virtpci_driver_sysfs_ops, -}; - -static struct virtpci_dev *vpcidev_list_head; -static DEFINE_RWLOCK(vpcidev_list_lock); - -/* filled in with info about this driver, wrt it servicing client busses */ -static struct ultra_vbus_deviceinfo bus_driver_info; - -/*****************************************************/ -/* debugfs entries */ -/*****************************************************/ -/* dentry is used to create the debugfs entry directory - * for virtpci - */ -static struct dentry *virtpci_debugfs_dir; - -struct virtpci_busdev { - struct device virtpci_bus_device; -}; - -/*****************************************************/ -/* Local functions */ -/*****************************************************/ - -static inline -int WAIT_FOR_IO_CHANNEL(struct spar_io_channel_protocol __iomem *chanptr) -{ - int count = 120; - - while (count > 0) { - if (SPAR_CHANNEL_SERVER_READY(&chanptr->channel_header)) - return 1; - UIS_THREAD_WAIT_SEC(1); - count--; - } - return 0; -} - -/* Write the contents of <info> to the ULTRA_VBUS_CHANNEL_PROTOCOL.ChpInfo. */ -static int write_vbus_chp_info(struct spar_vbus_channel_protocol *chan, - struct ultra_vbus_deviceinfo *info) -{ - int off; - - if (!chan) - return -1; - - off = sizeof(struct channel_header) + chan->hdr_info.chp_info_offset; - if (chan->hdr_info.chp_info_offset == 0) { - return -1; - } - memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); - return 0; -} - -/* Write the contents of <info> to the ULTRA_VBUS_CHANNEL_PROTOCOL.BusInfo. */ -static int write_vbus_bus_info(struct spar_vbus_channel_protocol *chan, - struct ultra_vbus_deviceinfo *info) -{ - int off; - - if (!chan) - return -1; - - off = sizeof(struct channel_header) + chan->hdr_info.bus_info_offset; - if (chan->hdr_info.bus_info_offset == 0) - return -1; - memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); - return 0; -} - -/* Write the contents of <info> to the - * ULTRA_VBUS_CHANNEL_PROTOCOL.DevInfo[<devix>]. - */ -static int -write_vbus_dev_info(struct spar_vbus_channel_protocol *chan, - struct ultra_vbus_deviceinfo *info, int devix) -{ - int off; - - if (!chan) - return -1; - - off = - (sizeof(struct channel_header) + - chan->hdr_info.dev_info_offset) + - (chan->hdr_info.device_info_struct_bytes * devix); - if (chan->hdr_info.dev_info_offset == 0) - return -1; - - memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); - return 0; -} - -/* adds a vbus - * returns 0 failure, 1 success, - */ -static int add_vbus(struct add_vbus_guestpart *addparams) -{ - int ret; - struct device *vbus; - - vbus = kzalloc(sizeof(*vbus), GFP_ATOMIC); - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!vbus) - return 0; - - dev_set_name(vbus, "vbus%d", addparams->bus_no); - vbus->release = virtpci_bus_release; - vbus->parent = &virtpci_rootbus_device; /* root bus is parent */ - vbus->bus = &virtpci_bus_type; /* bus type */ - vbus->platform_data = (__force void *)addparams->chanptr; - - /* register a virt bus device - - * this bus shows up under /sys/devices with .name value - * "virtpci%d" any devices added to this bus then show up under - * /sys/devices/virtpci0 - */ - ret = device_register(vbus); - if (ret) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - write_vbus_chp_info(vbus->platform_data /* chanptr */, - &chipset_driver_info); - write_vbus_bus_info(vbus->platform_data /* chanptr */, - &bus_driver_info); - POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 1; -} - -/* for CHANSOCK wwwnn/max are AUTO-GENERATED; for normal channels, - * wwnn/max are in the channel header. - */ -#define GET_SCSIADAPINFO_FROM_CHANPTR(chanptr) { \ - memcpy_fromio(&scsi.wwnn, \ - &((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vhba.wwnn, \ - sizeof(struct vhba_wwnn)); \ - memcpy_fromio(&scsi.max, \ - &((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vhba.max, \ - sizeof(struct vhba_config_max)); \ - } - -/* adds a vhba - * returns 0 failure, 1 success, - */ -static int add_vhba(struct add_virt_guestpart *addparams) -{ - int i; - struct scsi_adap_info scsi; - struct device *vbus; - unsigned char busid[BUS_ID_SIZE]; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!WAIT_FOR_IO_CHANNEL - ((struct spar_io_channel_protocol __iomem *)addparams->chanptr)) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - GET_SCSIADAPINFO_FROM_CHANPTR(addparams->chanptr); - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", addparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - i = virtpci_device_add(vbus, VIRTHBA_TYPE, addparams, &scsi, NULL); - if (i) { - POSTCODE_LINUX_3(VPCI_CREATE_EXIT_PC, i, - POSTCODE_SEVERITY_INFO); - } - return i; -} - -/* for CHANSOCK macaddr is AUTO-GENERATED; for normal channels, - * macaddr is in the channel header. - */ -#define GET_NETADAPINFO_FROM_CHANPTR(chanptr) { \ - memcpy_fromio(net.mac_addr, \ - ((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vnic.macaddr, \ - MAX_MACADDR_LEN); \ - net.num_rcv_bufs = \ - readl(&((struct spar_io_channel_protocol __iomem *)\ - chanptr)->vnic.num_rcv_bufs); \ - net.mtu = readl(&((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vnic.mtu); \ - memcpy_fromio(&net.zone_uuid, \ - &((struct spar_io_channel_protocol __iomem *)\ - chanptr)->vnic.zone_uuid, \ - sizeof(uuid_le)); \ -} - -/* adds a vnic - * returns 0 failure, 1 success, - */ -static int -add_vnic(struct add_virt_guestpart *addparams) -{ - int i; - struct net_adap_info net; - struct device *vbus; - unsigned char busid[BUS_ID_SIZE]; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!WAIT_FOR_IO_CHANNEL - ((struct spar_io_channel_protocol __iomem *)addparams->chanptr)) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - GET_NETADAPINFO_FROM_CHANPTR(addparams->chanptr); - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", addparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - i = virtpci_device_add(vbus, VIRTNIC_TYPE, addparams, NULL, &net); - if (i) { - POSTCODE_LINUX_3(VPCI_CREATE_EXIT_PC, i, - POSTCODE_SEVERITY_INFO); - return 1; - } - return 0; -} - -/* delete vbus - * returns 0 failure, 1 success, - */ -static int -delete_vbus(struct del_vbus_guestpart *delparams) -{ - struct device *vbus; - unsigned char busid[BUS_ID_SIZE]; - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", delparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - /* ensure that bus has no devices? -- TBD */ - return 1; -} - -static int -delete_vbus_device(struct device *vbus, void *data) -{ - struct device *dev = &virtpci_rootbus_device; - - if ((data) && match_busid(vbus, (void *)BUS_ID(dev))) { - /* skip it - don't delete root bus */ - return 0; /* pretend no error */ - } - device_unregister(vbus); - kfree(vbus); - return 0; /* no error */ -} - -/* pause vhba -* returns 0 failure, 1 success, -*/ -static int pause_vhba(struct pause_virt_guestpart *pauseparams) -{ - int i; - struct scsi_adap_info scsi; - - GET_SCSIADAPINFO_FROM_CHANPTR(pauseparams->chanptr); - - i = virtpci_device_serverdown(NULL /*no parent bus */, VIRTHBA_TYPE, - &scsi.wwnn, NULL); - return i; -} - -/* pause vnic - * returns 0 failure, 1 success, - */ -static int pause_vnic(struct pause_virt_guestpart *pauseparams) -{ - int i; - struct net_adap_info net; - - GET_NETADAPINFO_FROM_CHANPTR(pauseparams->chanptr); - - i = virtpci_device_serverdown(NULL /*no parent bus */, VIRTNIC_TYPE, - NULL, net.mac_addr); - return i; -} - -/* resume vhba - * returns 0 failure, 1 success, - */ -static int resume_vhba(struct resume_virt_guestpart *resumeparams) -{ - int i; - struct scsi_adap_info scsi; - - GET_SCSIADAPINFO_FROM_CHANPTR(resumeparams->chanptr); - - i = virtpci_device_serverup(NULL /*no parent bus */, VIRTHBA_TYPE, - &scsi.wwnn, NULL); - return i; -} - -/* resume vnic -* returns 0 failure, 1 success, -*/ -static int -resume_vnic(struct resume_virt_guestpart *resumeparams) -{ - int i; - struct net_adap_info net; - - GET_NETADAPINFO_FROM_CHANPTR(resumeparams->chanptr); - - i = virtpci_device_serverup(NULL /*no parent bus */, VIRTNIC_TYPE, - NULL, net.mac_addr); - return i; -} - -/* delete vhba -* returns 0 failure, 1 success, -*/ -static int delete_vhba(struct del_virt_guestpart *delparams) -{ - int i; - struct scsi_adap_info scsi; - - GET_SCSIADAPINFO_FROM_CHANPTR(delparams->chanptr); - - i = virtpci_device_del(NULL /*no parent bus */, VIRTHBA_TYPE, - &scsi.wwnn, NULL); - if (i) { - return 1; - } - return 0; -} - -/* deletes a vnic - * returns 0 failure, 1 success, - */ -static int delete_vnic(struct del_virt_guestpart *delparams) -{ - int i; - struct net_adap_info net; - - GET_NETADAPINFO_FROM_CHANPTR(delparams->chanptr); - - i = virtpci_device_del(NULL /*no parent bus */, VIRTNIC_TYPE, NULL, - net.mac_addr); - return i; -} - -#define DELETE_ONE_VPCIDEV(vpcidev) { \ - device_unregister(&vpcidev->generic_dev); \ - kfree(vpcidev); \ -} - -/* deletes all vhbas and vnics - * returns 0 failure, 1 success, - */ -static void delete_all(void) -{ - int count = 0; - unsigned long flags; - struct virtpci_dev *tmpvpcidev, *nextvpcidev; - - /* delete the entire vhba/vnic list in one shot */ - write_lock_irqsave(&vpcidev_list_lock, flags); - tmpvpcidev = vpcidev_list_head; - vpcidev_list_head = NULL; - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - /* delete one vhba/vnic at a time */ - while (tmpvpcidev) { - nextvpcidev = tmpvpcidev->next; - /* delete the vhba/vnic at tmpvpcidev */ - DELETE_ONE_VPCIDEV(tmpvpcidev); - tmpvpcidev = nextvpcidev; - count++; - } - - /* now delete each vbus */ - bus_for_each_dev(&virtpci_bus_type, NULL, (void *)1, - delete_vbus_device); -} - -/* deletes all vnics or vhbas - * returns 0 failure, 1 success, - */ -static int delete_all_virt(enum virtpci_dev_type devtype, - struct del_vbus_guestpart *delparams) -{ - int i; - unsigned char busid[BUS_ID_SIZE]; - struct device *vbus; - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", delparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - /* delete all vhbas/vnics */ - i = virtpci_device_del(vbus, devtype, NULL, NULL); - return 1; -} - -static int virtpci_ctrlchan_func(struct guest_msgs *msg) -{ - switch (msg->msgtype) { - case GUEST_ADD_VBUS: - return add_vbus(&msg->add_vbus); - case GUEST_ADD_VHBA: - return add_vhba(&msg->add_vhba); - case GUEST_ADD_VNIC: - return add_vnic(&msg->add_vnic); - case GUEST_DEL_VBUS: - return delete_vbus(&msg->del_vbus); - case GUEST_DEL_VHBA: - return delete_vhba(&msg->del_vhba); - case GUEST_DEL_VNIC: - return delete_vnic(&msg->del_vhba); - case GUEST_DEL_ALL_VHBAS: - return delete_all_virt(VIRTHBA_TYPE, &msg->del_all_vhbas); - case GUEST_DEL_ALL_VNICS: - return delete_all_virt(VIRTNIC_TYPE, &msg->del_all_vnics); - case GUEST_DEL_ALL_VBUSES: - delete_all(); - return 1; - case GUEST_PAUSE_VHBA: - return pause_vhba(&msg->pause_vhba); - case GUEST_PAUSE_VNIC: - return pause_vnic(&msg->pause_vnic); - case GUEST_RESUME_VHBA: - return resume_vhba(&msg->resume_vhba); - case GUEST_RESUME_VNIC: - return resume_vnic(&msg->resume_vnic); - default: - return 0; - } -} - -/* same as driver_helper in bus.c linux */ -static int match_busid(struct device *dev, void *data) -{ - const char *name = data; - - if (strcmp(name, BUS_ID(dev)) == 0) - return 1; - return 0; -} - -/*****************************************************/ -/* Bus functions */ -/*****************************************************/ - -static const struct pci_device_id * -virtpci_match_device(const struct pci_device_id *ids, - const struct virtpci_dev *dev) -{ - while (ids->vendor || ids->subvendor || ids->class_mask) { - if ((ids->vendor == dev->vendor) && - (ids->device == dev->device)) - return ids; - - ids++; - } - return NULL; -} - -/* NOTE: !!!!!! This function is called when a new device is added -* for this bus. Or, it is called for existing devices when a new -* driver is added for this bus. It returns nonzero if a given device -* can be handled by the given driver. -*/ -static int virtpci_bus_match(struct device *dev, struct device_driver *drv) -{ - struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev); - struct virtpci_driver *virtpcidrv = driver_to_virtpci_driver(drv); - int match = 0; - - /* check ids list for a match */ - if (virtpci_match_device(virtpcidrv->id_table, virtpcidev)) - match = 1; - - return match; /* 0 - no match; 1 - yes it matches */ -} - -static int virtpci_uevent(struct device *dev, struct kobj_uevent_env *env) -{ - /* add variables to the environment prior to the generation of - * hotplug events to user space - */ - if (add_uevent_var(env, "VIRTPCI_VERSION=%s", VIRTPCI_VERSION)) - return -ENOMEM; - return 0; -} - -/* For a child device just created on a client bus, fill in - * information about the driver that is controlling this device into - * the appropriate slot within the vbus channel of the bus - * instance. - */ -static void fix_vbus_dev_info(struct device *dev, int dev_no, int dev_type, - struct virtpci_driver *virtpcidrv) -{ - struct device *vbus; - void *chan; - struct ultra_vbus_deviceinfo dev_info; - const char *stype; - - if (!dev) - return; - if (!virtpcidrv) - return; - - vbus = dev->parent; - if (!vbus) - return; - - chan = vbus->platform_data; - if (!chan) - return; - - switch (dev_type) { - case PCI_DEVICE_ID_VIRTHBA: - stype = "vHBA"; - break; - case PCI_DEVICE_ID_VIRTNIC: - stype = "vNIC"; - break; - default: - stype = "unknown"; - break; - } - bus_device_info_init(&dev_info, stype, - virtpcidrv->name, - virtpcidrv->version, - virtpcidrv->vertag); - write_vbus_dev_info(chan, &dev_info, dev_no); - - /* Re-write bus+chipset info, because it is possible that this - * was previously written by our good counterpart, visorbus. - */ - write_vbus_chp_info(chan, &chipset_driver_info); - write_vbus_bus_info(chan, &bus_driver_info); -} - -/* This function is called to query the existence of a specific device -* and whether this driver can work with it. It should return -ENODEV -* in case of failure. -*/ -static int virtpci_device_probe(struct device *dev) -{ - struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev); - struct virtpci_driver *virtpcidrv = - driver_to_virtpci_driver(dev->driver); - const struct pci_device_id *id; - int error = 0; - - POSTCODE_LINUX_2(VPCI_PROBE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - /* static match and static probe vs dynamic match & dynamic - * probe - do we care?. - */ - if (!virtpcidrv->id_table) - return -ENODEV; - - id = virtpci_match_device(virtpcidrv->id_table, virtpcidev); - if (!id) - return -ENODEV; - - /* increment reference count */ - get_device(dev); - - /* if virtpcidev is not already claimed & probe function is - * valid, probe it - */ - if (!virtpcidev->mydriver && virtpcidrv->probe) { - /* call the probe function - virthba or virtnic probe - * is what it should be - */ - error = virtpcidrv->probe(virtpcidev, id); - if (!error) { - fix_vbus_dev_info(dev, virtpcidev->device_no, - virtpcidev->device, virtpcidrv); - virtpcidev->mydriver = virtpcidrv; - POSTCODE_LINUX_2(VPCI_PROBE_EXIT_PC, - POSTCODE_SEVERITY_INFO); - } else { - put_device(dev); - } - } - POSTCODE_LINUX_2(VPCI_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return error; /* -ENODEV for probe failure */ -} - -static int virtpci_device_remove(struct device *dev_) -{ - /* dev_ passed in is the HBA device which we called - * generic_dev in our virtpcidev struct - */ - struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev_); - struct virtpci_driver *virtpcidrv = virtpcidev->mydriver; - - if (virtpcidrv) { - /* TEMP: assuming we have only one such driver for now */ - if (virtpcidrv->remove) - virtpcidrv->remove(virtpcidev); - virtpcidev->mydriver = NULL; - } - - put_device(dev_); - return 0; -} - -/*****************************************************/ -/* Bus functions */ -/*****************************************************/ - -static void virtpci_bus_release(struct device *dev) -{ -} - -/*****************************************************/ -/* Adapter functions */ -/*****************************************************/ - -/* scsi is expected to be NULL for VNIC add - * net is expected to be NULL for VHBA add - */ -static int virtpci_device_add(struct device *parentbus, int devtype, - struct add_virt_guestpart *addparams, - struct scsi_adap_info *scsi, - struct net_adap_info *net) -{ - struct virtpci_dev *virtpcidev = NULL; - struct virtpci_dev *tmpvpcidev = NULL, *prev; - unsigned long flags; - int ret; - struct spar_io_channel_protocol __iomem *io_chan = NULL; - struct device *dev; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) { - POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, devtype, - POSTCODE_SEVERITY_ERR); - return 0; - } - - /* add a Virtual Device */ - virtpcidev = kzalloc(sizeof(*virtpcidev), GFP_ATOMIC); - if (!virtpcidev) { - POSTCODE_LINUX_2(MALLOC_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - /* initialize stuff unique to virtpci_dev struct */ - virtpcidev->devtype = devtype; - if (devtype == VIRTHBA_TYPE) { - virtpcidev->device = PCI_DEVICE_ID_VIRTHBA; - virtpcidev->scsi = *scsi; - } else { - virtpcidev->device = PCI_DEVICE_ID_VIRTNIC; - virtpcidev->net = *net; - } - virtpcidev->vendor = PCI_VENDOR_ID_UNISYS; - virtpcidev->bus_no = addparams->bus_no; - virtpcidev->device_no = addparams->device_no; - - virtpcidev->queueinfo.chan = addparams->chanptr; - virtpcidev->queueinfo.send_int_if_needed = NULL; - - /* Set up safe queue... */ - io_chan = (struct spar_io_channel_protocol __iomem *) - virtpcidev->queueinfo.chan; - - virtpcidev->intr = addparams->intr; - - /* initialize stuff in the device portion of the struct */ - virtpcidev->generic_dev.bus = &virtpci_bus_type; - virtpcidev->generic_dev.parent = parentbus; - virtpcidev->generic_dev.release = virtpci_device_release; - - dev_set_name(&virtpcidev->generic_dev, "%x:%x", - addparams->bus_no, addparams->device_no); - - /* add the vhba/vnic to virtpci device list - but check for - * duplicate wwnn/macaddr first - */ - write_lock_irqsave(&vpcidev_list_lock, flags); - for (tmpvpcidev = vpcidev_list_head; tmpvpcidev; - tmpvpcidev = tmpvpcidev->next) { - if (devtype == VIRTHBA_TYPE) { - if ((tmpvpcidev->scsi.wwnn.wwnn1 == scsi->wwnn.wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == scsi->wwnn.wwnn2)) { - /* duplicate - already have vpcidev - with this wwnn */ - break; - } - } else - if (memcmp - (tmpvpcidev->net.mac_addr, net->mac_addr, - MAX_MACADDR_LEN) == 0) { - /* duplicate - already have vnic with this wwnn */ - break; - } - } - if (tmpvpcidev) { - /* found a vhba/vnic already in the list with same - * wwnn or macaddr - reject add - */ - write_unlock_irqrestore(&vpcidev_list_lock, flags); - kfree(virtpcidev); - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - /* add it at the head */ - if (!vpcidev_list_head) { - vpcidev_list_head = virtpcidev; - } else { - /* insert virtpcidev at the head of our linked list of - * vpcidevs - */ - virtpcidev->next = vpcidev_list_head; - vpcidev_list_head = virtpcidev; - } - - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - /* Must transition channel to ATTACHED state BEFORE - * registering the device, because polling of the channel - * queues can begin at any time after device_register(). - */ - dev = &virtpcidev->generic_dev; - SPAR_CHANNEL_CLIENT_TRANSITION(addparams->chanptr, - BUS_ID(dev), - CHANNELCLI_ATTACHED, NULL); - - /* don't register until device has been added to - * list. Otherwise, a device_unregister from this function can - * cause a "scheduling while atomic". - */ - ret = device_register(&virtpcidev->generic_dev); - /* NOTE: THIS IS CALLING HOTPLUG virtpci_hotplug!!! - * This call to device_register results in virtpci_bus_match - * being called !!!!! And, if match returns success, then - * virtpcidev->generic_dev.driver is setup to core_driver, - * i.e., virtpci and the probe function - * virtpcidev->generic_dev.driver->probe is called which - * results in virtpci_device_probe being called. And if - * virtpci_device_probe is successful - */ - if (ret) { - dev = &virtpcidev->generic_dev; - SPAR_CHANNEL_CLIENT_TRANSITION(addparams->chanptr, - BUS_ID(dev), - CHANNELCLI_DETACHED, NULL); - /* remove virtpcidev, the one we just added, from the list */ - write_lock_irqsave(&vpcidev_list_lock, flags); - for (tmpvpcidev = vpcidev_list_head, prev = NULL; - tmpvpcidev; - prev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { - if (tmpvpcidev == virtpcidev) { - if (prev) - prev->next = tmpvpcidev->next; - else - vpcidev_list_head = tmpvpcidev->next; - break; - } - } - write_unlock_irqrestore(&vpcidev_list_lock, flags); - kfree(virtpcidev); - return 0; - } - - POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 1; -} - -static int virtpci_device_serverdown(struct device *parentbus, - int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]) -{ - int pausethisone = 0; - bool found = false; - struct virtpci_dev *tmpvpcidev, *prevvpcidev; - struct virtpci_driver *vpcidriver; - unsigned long flags; - int rc = 0; - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - /* find the vhba or vnic in virtpci device list */ - write_lock_irqsave(&vpcidev_list_lock, flags); - - for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; - (tmpvpcidev && !found); - prevvpcidev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { - if (tmpvpcidev->devtype != devtype) - continue; - - if (devtype == VIRTHBA_TYPE) { - pausethisone = - ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); - /* devtype is vhba, we're pausing vhba whose - * wwnn matches the current device's wwnn - */ - } else { /* VIRTNIC_TYPE */ - pausethisone = - memcmp(tmpvpcidev->net.mac_addr, macaddr, - MAX_MACADDR_LEN) == 0; - /* devtype is vnic, we're pausing vnic whose - * macaddr matches the current device's macaddr */ - } - - if (!pausethisone) - continue; - - found = true; - vpcidriver = tmpvpcidev->mydriver; - rc = vpcidriver->suspend(tmpvpcidev, 0); - } - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - if (!found) - return 0; - - return rc; -} - -static int virtpci_device_serverup(struct device *parentbus, - int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]) -{ - int resumethisone = 0; - bool found = false; - struct virtpci_dev *tmpvpcidev, *prevvpcidev; - struct virtpci_driver *vpcidriver; - unsigned long flags; - int rc = 0; - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - - /* find the vhba or vnic in virtpci device list */ - write_lock_irqsave(&vpcidev_list_lock, flags); - - for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; - (tmpvpcidev && !found); - prevvpcidev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { - if (tmpvpcidev->devtype != devtype) - continue; - - if (devtype == VIRTHBA_TYPE) { - resumethisone = - ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); - /* devtype is vhba, we're resuming vhba whose - * wwnn matches the current device's wwnn */ - } else { /* VIRTNIC_TYPE */ - resumethisone = - memcmp(tmpvpcidev->net.mac_addr, macaddr, - MAX_MACADDR_LEN) == 0; - /* devtype is vnic, we're resuming vnic whose - * macaddr matches the current device's macaddr */ - } - - if (!resumethisone) - continue; - - found = true; - vpcidriver = tmpvpcidev->mydriver; - /* This should be done at BUS resume time, but an - * existing problem prevents us from ever getting a bus - * resume... This hack would fail to work should we - * ever have a bus that contains NO devices, since we - * would never even get here in that case. - */ - fix_vbus_dev_info(&tmpvpcidev->generic_dev, - tmpvpcidev->device_no, - tmpvpcidev->device, vpcidriver); - rc = vpcidriver->resume(tmpvpcidev); - } - - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - if (!found) - return 0; - - return rc; -} - -static int virtpci_device_del(struct device *parentbus, - int devtype, struct vhba_wwnn *wwnn, - unsigned char macaddr[]) -{ - int count = 0, all = 0, delthisone; - struct virtpci_dev *tmpvpcidev, *prevvpcidev, *dellist = NULL; - unsigned long flags; - -#define DEL_CONTINUE { \ - prevvpcidev = tmpvpcidev;\ - tmpvpcidev = tmpvpcidev->next;\ - continue; \ -} - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - /* see if we are to delete all - NOTE: all implies we have a - * valid parentbus - */ - all = ((devtype == VIRTHBA_TYPE) && (!wwnn)) || - ((devtype == VIRTNIC_TYPE) && (!macaddr)); - - /* find all the vhba or vnic or both in virtpci device list - * keep list of ones we are deleting so we can call - * device_unregister after we release the lock; otherwise we - * encounter "schedule while atomic" - */ - write_lock_irqsave(&vpcidev_list_lock, flags); - for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; tmpvpcidev;) { - if (tmpvpcidev->devtype != devtype) - DEL_CONTINUE; - - if (all) { - delthisone = - (tmpvpcidev->generic_dev.parent == parentbus); - /* we're deleting all vhbas or vnics on the - * specified parent bus - */ - } else if (devtype == VIRTHBA_TYPE) { - delthisone = - ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); - /* devtype is vhba, we're deleting vhba whose - * wwnn matches the current device's wwnn - */ - } else { /* VIRTNIC_TYPE */ - delthisone = - memcmp(tmpvpcidev->net.mac_addr, macaddr, - MAX_MACADDR_LEN) == 0; - /* devtype is vnic, we're deleting vnic whose - * macaddr matches the current device's macaddr - */ - } - - if (!delthisone) - DEL_CONTINUE; - - /* take vhba/vnic out of the list */ - if (prevvpcidev) - /* not at head */ - prevvpcidev->next = tmpvpcidev->next; - else - vpcidev_list_head = tmpvpcidev->next; - - /* add it to our deletelist */ - tmpvpcidev->next = dellist; - dellist = tmpvpcidev; - - count++; - if (!all) - break; /* done */ - /* going to top of loop again - set tmpvpcidev to next - * one we're to process - */ - if (prevvpcidev) - tmpvpcidev = prevvpcidev->next; - else - tmpvpcidev = vpcidev_list_head; - } - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - if (!all && (count == 0)) - return 0; - - /* now delete each one from delete list */ - while (dellist) { - /* save next */ - tmpvpcidev = dellist->next; - /* delete the vhba/vnic at dellist */ - DELETE_ONE_VPCIDEV(dellist); - /* do next */ - dellist = tmpvpcidev; - } - - return count; -} - -static void virtpci_device_release(struct device *dev_) -{ - /* this function is called when the last reference to the - * device is removed - */ -} - -/*****************************************************/ -/* Driver functions */ -/*****************************************************/ - -#define kobj_to_device_driver(obj) container_of(obj, struct device_driver, kobj) -#define attribute_to_driver_attribute(obj) \ - container_of(obj, struct driver_attribute, attr) - -static ssize_t virtpci_driver_attr_show(struct kobject *kobj, - struct attribute *attr, - char *buf) -{ - struct driver_attribute *dattr = attribute_to_driver_attribute(attr); - ssize_t ret = 0; - - struct driver_private *dprivate = to_driver(kobj); - struct device_driver *driver = dprivate->driver; - - if (dattr->show) - ret = dattr->show(driver, buf); - - return ret; -} - -static ssize_t virtpci_driver_attr_store(struct kobject *kobj, - struct attribute *attr, - const char *buf, size_t count) -{ - struct driver_attribute *dattr = attribute_to_driver_attribute(attr); - ssize_t ret = 0; - - struct driver_private *dprivate = to_driver(kobj); - struct device_driver *driver = dprivate->driver; - - if (dattr->store) - ret = dattr->store(driver, buf, count); - - return ret; -} - -/* register a new virtpci driver */ -int virtpci_register_driver(struct virtpci_driver *drv) -{ - int result = 0; - - if (!drv->id_table) - return 1; - /* initialize core driver fields needed to call driver_register */ - drv->core_driver.name = drv->name; /* name of driver in sysfs */ - drv->core_driver.bus = &virtpci_bus_type; /* type of bus this - * driver works with */ - drv->core_driver.probe = virtpci_device_probe; /* called to query the - * existence of a - * specific device and - * whether this driver - *can work with it */ - drv->core_driver.remove = virtpci_device_remove; /* called when the - * device is removed - * from the system */ - /* register with core */ - result = driver_register(&drv->core_driver); - /* calls bus_add_driver which calls driver_attach and - * module_add_driver - */ - if (result) - return result; /* failed */ - - drv->core_driver.p->kobj.ktype = &virtpci_driver_kobj_type; - - return 0; -} -EXPORT_SYMBOL_GPL(virtpci_register_driver); - -void virtpci_unregister_driver(struct virtpci_driver *drv) -{ - driver_unregister(&drv->core_driver); - /* driver_unregister calls bus_remove_driver - * bus_remove_driver calls device_detach - * device_detach calls device_release_driver for each of the - * driver's devices - * device_release driver calls drv->remove which is - * virtpci_device_remove - * virtpci_device_remove calls virthba_remove - */ -} -EXPORT_SYMBOL_GPL(virtpci_unregister_driver); - -/*****************************************************/ -/* debugfs filesystem functions */ -/*****************************************************/ -struct print_vbus_info { - int *str_pos; - char *buf; - size_t *len; -}; - -static int print_vbus(struct device *vbus, void *data) -{ - struct print_vbus_info *p = (struct print_vbus_info *)data; - - *p->str_pos += scnprintf(p->buf + *p->str_pos, *p->len - *p->str_pos, - "bus_id:%s\n", dev_name(vbus)); - return 0; -} - -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset) -{ - ssize_t bytes_read = 0; - int str_pos = 0; - struct virtpci_dev *tmpvpcidev; - unsigned long flags; - struct print_vbus_info printparam; - char *vbuf; - - if (len > MAX_BUF) - len = MAX_BUF; - vbuf = kzalloc(len, GFP_KERNEL); - if (!vbuf) - return -ENOMEM; - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " Virtual PCI Bus devices\n"); - printparam.str_pos = &str_pos; - printparam.buf = vbuf; - printparam.len = &len; - bus_for_each_dev(&virtpci_bus_type, NULL, (void *)&printparam, - print_vbus); - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "\n Virtual PCI devices\n"); - read_lock_irqsave(&vpcidev_list_lock, flags); - tmpvpcidev = vpcidev_list_head; - while (tmpvpcidev) { - if (tmpvpcidev->devtype == VIRTHBA_TYPE) { - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "[%d:%d] VHba:%08x:%08x max-config:%d-%d-%d-%d", - tmpvpcidev->bus_no, - tmpvpcidev->device_no, - tmpvpcidev->scsi.wwnn.wwnn1, - tmpvpcidev->scsi.wwnn.wwnn2, - tmpvpcidev->scsi.max.max_channel, - tmpvpcidev->scsi.max.max_id, - tmpvpcidev->scsi.max.max_lun, - tmpvpcidev->scsi.max.cmd_per_lun); - } else { - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "[%d:%d] VNic:%pM num_rcv_bufs:%d mtu:%d", - tmpvpcidev->bus_no, - tmpvpcidev->device_no, - tmpvpcidev->net.mac_addr, - tmpvpcidev->net.num_rcv_bufs, - tmpvpcidev->net.mtu); - } - str_pos += scnprintf(vbuf + str_pos, - len - str_pos, " chanptr:%p\n", - tmpvpcidev->queueinfo.chan); - tmpvpcidev = tmpvpcidev->next; - } - read_unlock_irqrestore(&vpcidev_list_lock, flags); - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, "\n"); - bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos); - kfree(vbuf); - return bytes_read; -} - -/*****************************************************/ -/* Module Init & Exit functions */ -/*****************************************************/ - -static int __init virtpci_mod_init(void) -{ - int ret; - - if (!unisys_spar_platform) - return -ENODEV; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - - ret = bus_register(&virtpci_bus_type); - /* creates /sys/bus/uisvirtpci which contains devices & - * drivers directory - */ - if (ret) { - POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, ret, - POSTCODE_SEVERITY_ERR); - return ret; - } - bus_device_info_init(&bus_driver_info, "clientbus", "virtpci", - VERSION, NULL); - - /* create a root bus used to parent all the virtpci buses. */ - ret = device_register(&virtpci_rootbus_device); - if (ret) { - bus_unregister(&virtpci_bus_type); - POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, ret, - POSTCODE_SEVERITY_ERR); - return ret; - } - - if (!uisctrl_register_req_handler(2, (void *)&virtpci_ctrlchan_func, - &chipset_driver_info)) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - device_unregister(&virtpci_rootbus_device); - bus_unregister(&virtpci_bus_type); - return -1; - } - - /* create debugfs directory and info file inside. */ - virtpci_debugfs_dir = debugfs_create_dir("virtpci", NULL); - debugfs_create_file("info", S_IRUSR, virtpci_debugfs_dir, - NULL, &debugfs_info_fops); - POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 0; -} - -static void __exit virtpci_mod_exit(void) -{ - /* unregister the callback function */ - device_unregister(&virtpci_rootbus_device); - bus_unregister(&virtpci_bus_type); - debugfs_remove_recursive(virtpci_debugfs_dir); -} - -module_init(virtpci_mod_init); -module_exit(virtpci_mod_exit); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Usha Srinivasan"); -MODULE_ALIAS("uisvirtpci"); - |