diff options
Diffstat (limited to 'drivers/cdrom/viocd.c')
| -rw-r--r-- | drivers/cdrom/viocd.c | 809 |
1 files changed, 809 insertions, 0 deletions
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c new file mode 100644 index 000000000000..fcca26c89bbc --- /dev/null +++ b/drivers/cdrom/viocd.c @@ -0,0 +1,809 @@ +/* -*- linux-c -*- + * drivers/cdrom/viocd.c + * + * iSeries Virtual CD Rom + * + * Authors: Dave Boutcher <boutcher@us.ibm.com> + * Ryan Arnold <ryanarn@us.ibm.com> + * Colin Devilbiss <devilbis@us.ibm.com> + * Stephen Rothwell <sfr@au1.ibm.com> + * + * (C) Copyright 2000-2004 IBM Corporation + * + * 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) anyu 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 + * + * This routine provides access to CD ROM drives owned and managed by an + * OS/400 partition running on the same box as this Linux partition. + * + * All operations are performed by sending messages back and forth to + * the OS/400 partition. + */ + +#include <linux/major.h> +#include <linux/blkdev.h> +#include <linux/cdrom.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/completion.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> + +#include <asm/bug.h> + +#include <asm/vio.h> +#include <asm/scatterlist.h> +#include <asm/iSeries/HvTypes.h> +#include <asm/iSeries/HvLpEvent.h> +#include <asm/iSeries/vio.h> + +#define VIOCD_DEVICE "iseries/vcd" +#define VIOCD_DEVICE_DEVFS "iseries/vcd" + +#define VIOCD_VERS "1.06" + +#define VIOCD_KERN_WARNING KERN_WARNING "viocd: " +#define VIOCD_KERN_INFO KERN_INFO "viocd: " + +struct viocdlpevent { + struct HvLpEvent event; + u32 reserved; + u16 version; + u16 sub_result; + u16 disk; + u16 flags; + u32 token; + u64 offset; /* On open, max number of disks */ + u64 len; /* On open, size of the disk */ + u32 block_size; /* Only set on open */ + u32 media_size; /* Only set on open */ +}; + +enum viocdsubtype { + viocdopen = 0x0001, + viocdclose = 0x0002, + viocdread = 0x0003, + viocdwrite = 0x0004, + viocdlockdoor = 0x0005, + viocdgetinfo = 0x0006, + viocdcheck = 0x0007 +}; + +/* + * Should probably make this a module parameter....sigh + */ +#define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS + +static const struct vio_error_entry viocd_err_table[] = { + {0x0201, EINVAL, "Invalid Range"}, + {0x0202, EINVAL, "Invalid Token"}, + {0x0203, EIO, "DMA Error"}, + {0x0204, EIO, "Use Error"}, + {0x0205, EIO, "Release Error"}, + {0x0206, EINVAL, "Invalid CD"}, + {0x020C, EROFS, "Read Only Device"}, + {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"}, + {0x020E, EIO, "Optical System Error (Varied Off?)"}, + {0x02FF, EIO, "Internal Error"}, + {0x3010, EIO, "Changed Volume"}, + {0xC100, EIO, "Optical System Error"}, + {0x0000, 0, NULL}, +}; + +/* + * This is the structure we use to exchange info between driver and interrupt + * handler + */ +struct viocd_waitevent { + struct completion com; + int rc; + u16 sub_result; + int changed; +}; + +/* this is a lookup table for the true capabilities of a device */ +struct capability_entry { + char *type; + int capability; +}; + +static struct capability_entry capability_table[] __initdata = { + { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, + { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, + { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, + { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, + { "6321", CDC_LOCK }, + { "632B", 0 }, + { NULL , CDC_LOCK }, +}; + +/* These are our internal structures for keeping track of devices */ +static int viocd_numdev; + +struct cdrom_info { + char rsrcname[10]; + char type[4]; + char model[3]; +}; +/* + * This needs to be allocated since it is passed to the + * Hypervisor and we may be a module. + */ +static struct cdrom_info *viocd_unitinfo; +static dma_addr_t unitinfo_dmaaddr; + +struct disk_info { + struct gendisk *viocd_disk; + struct cdrom_device_info viocd_info; + struct device *dev; +}; +static struct disk_info viocd_diskinfo[VIOCD_MAX_CD]; + +#define DEVICE_NR(di) ((di) - &viocd_diskinfo[0]) + +static spinlock_t viocd_reqlock; + +#define MAX_CD_REQ 1 + +/* procfs support */ +static int proc_viocd_show(struct seq_file *m, void *v) +{ + int i; + + for (i = 0; i < viocd_numdev; i++) { + seq_printf(m, "viocd device %d is iSeries resource %10.10s" + "type %4.4s, model %3.3s\n", + i, viocd_unitinfo[i].rsrcname, + viocd_unitinfo[i].type, + viocd_unitinfo[i].model); + } + return 0; +} + +static int proc_viocd_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_viocd_show, NULL); +} + +static struct file_operations proc_viocd_operations = { + .open = proc_viocd_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int viocd_blk_open(struct inode *inode, struct file *file) +{ + struct disk_info *di = inode->i_bdev->bd_disk->private_data; + return cdrom_open(&di->viocd_info, inode, file); +} + +static int viocd_blk_release(struct inode *inode, struct file *file) +{ + struct disk_info *di = inode->i_bdev->bd_disk->private_data; + return cdrom_release(&di->viocd_info, file); +} + +static int viocd_blk_ioctl(struct inode *inode, struct file *file, + unsigned cmd, unsigned long arg) +{ + struct disk_info *di = inode->i_bdev->bd_disk->private_data; + return cdrom_ioctl(file, &di->viocd_info, inode, cmd, arg); +} + +static int viocd_blk_media_changed(struct gendisk *disk) +{ + struct disk_info *di = disk->private_data; + return cdrom_media_changed(&di->viocd_info); +} + +struct block_device_operations viocd_fops = { + .owner = THIS_MODULE, + .open = viocd_blk_open, + .release = viocd_blk_release, + .ioctl = viocd_blk_ioctl, + .media_changed = viocd_blk_media_changed, +}; + +/* Get info on CD devices from OS/400 */ +static void __init get_viocd_info(void) +{ + HvLpEvent_Rc hvrc; + int i; + struct viocd_waitevent we; + + viocd_unitinfo = dma_alloc_coherent(iSeries_vio_dev, + sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, + &unitinfo_dmaaddr, GFP_ATOMIC); + if (viocd_unitinfo == NULL) { + printk(VIOCD_KERN_WARNING "error allocating unitinfo\n"); + return; + } + + memset(viocd_unitinfo, 0, sizeof(*viocd_unitinfo) * VIOCD_MAX_CD); + + init_completion(&we.com); + + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, + viomajorsubtype_cdio | viocdgetinfo, + HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), + (u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0, + sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, 0); + if (hvrc != HvLpEvent_Rc_Good) { + printk(VIOCD_KERN_WARNING "cdrom error sending event. rc %d\n", + (int)hvrc); + goto error_ret; + } + + wait_for_completion(&we.com); + + if (we.rc) { + const struct vio_error_entry *err = + vio_lookup_rc(viocd_err_table, we.sub_result); + printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on getinfo: %s\n", + we.rc, we.sub_result, err->msg); + goto error_ret; + } + + for (i = 0; (i < VIOCD_MAX_CD) && viocd_unitinfo[i].rsrcname[0]; i++) + viocd_numdev++; + +error_ret: + if (viocd_numdev == 0) { + dma_free_coherent(iSeries_vio_dev, + sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, + viocd_unitinfo, unitinfo_dmaaddr); + viocd_unitinfo = NULL; + } +} + +static int viocd_open(struct cdrom_device_info *cdi, int purpose) +{ + struct disk_info *diskinfo = cdi->handle; + int device_no = DEVICE_NR(diskinfo); + HvLpEvent_Rc hvrc; + struct viocd_waitevent we; + + init_completion(&we.com); + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, + viomajorsubtype_cdio | viocdopen, + HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), + (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), + 0, 0, 0); + if (hvrc != 0) { + printk(VIOCD_KERN_WARNING + "bad rc on HvCallEvent_signalLpEventFast %d\n", + (int)hvrc); + return -EIO; + } + + wait_for_completion(&we.com); + + if (we.rc) { + const struct vio_error_entry *err = + vio_lookup_rc(viocd_err_table, we.sub_result); + printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n", + we.rc, we.sub_result, err->msg); + return -err->errno; + } + + return 0; +} + +static void viocd_release(struct cdrom_device_info *cdi) +{ + int device_no = DEVICE_NR((struct disk_info *)cdi->handle); + HvLpEvent_Rc hvrc; + + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, + viomajorsubtype_cdio | viocdclose, + HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), 0, + VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); + if (hvrc != 0) + printk(VIOCD_KERN_WARNING + "bad rc on HvCallEvent_signalLpEventFast %d\n", + (int)hvrc); +} + +/* Send a read or write request to OS/400 */ +static int send_request(struct request *req) +{ + HvLpEvent_Rc hvrc; + struct disk_info *diskinfo = req->rq_disk->private_data; + u64 len; + dma_addr_t dmaaddr; + int direction; + u16 cmd; + struct scatterlist sg; + + BUG_ON(req->nr_phys_segments > 1); + + if (rq_data_dir(req) == READ) { + direction = DMA_FROM_DEVICE; + cmd = viomajorsubtype_cdio | viocdread; + } else { + direction = DMA_TO_DEVICE; + cmd = viomajorsubtype_cdio | viocdwrite; + } + + if (blk_rq_map_sg(req->q, req, &sg) == 0) { + printk(VIOCD_KERN_WARNING + "error setting up scatter/gather list\n"); + return -1; + } + + if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { + printk(VIOCD_KERN_WARNING "error allocating sg tce\n"); + return -1; + } + dmaaddr = sg_dma_address(&sg); + len = sg_dma_len(&sg); + + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, cmd, + HvLpEvent_AckInd_DoAck, + HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), + (u64)req, VIOVERSION << 16, + ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, + (u64)req->sector * 512, len, 0); + if (hvrc != HvLpEvent_Rc_Good) { + printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc); + return -1; + } + + return 0; +} + + +static int rwreq; + +static void do_viocd_request(request_queue_t *q) +{ + struct request *req; + + while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) { + if (!blk_fs_request(req)) + end_request(req, 0); + else if (send_request(req) < 0) { + printk(VIOCD_KERN_WARNING + "unable to send message to OS/400!"); + end_request(req, 0); + } else + rwreq++; + } +} + +static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) +{ + struct viocd_waitevent we; + HvLpEvent_Rc hvrc; + int device_no = DEVICE_NR((struct disk_info *)cdi->handle); + + init_completion(&we.com); + + /* Send the open event to OS/400 */ + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, + viomajorsubtype_cdio | viocdcheck, + HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), + (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), + 0, 0, 0); + if (hvrc != 0) { + printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", + (int)hvrc); + return -EIO; + } + + wait_for_completion(&we.com); + + /* Check the return code. If bad, assume no change */ + if (we.rc) { + const struct vio_error_entry *err = + vio_lookup_rc(viocd_err_table, we.sub_result); + printk(VIOCD_KERN_WARNING + "bad rc %d:0x%04X on check_change: %s; Assuming no change\n", + we.rc, we.sub_result, err->msg); + return 0; + } + + return we.changed; +} + +static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) +{ + HvLpEvent_Rc hvrc; + u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); + /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ + u64 flags = !!locking; + struct viocd_waitevent we; + + init_completion(&we.com); + + /* Send the lockdoor event to OS/400 */ + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, + viomajorsubtype_cdio | viocdlockdoor, + HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), + (u64)&we, VIOVERSION << 16, + (device_no << 48) | (flags << 32), 0, 0, 0); + if (hvrc != 0) { + printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", + (int)hvrc); + return -EIO; + } + + wait_for_completion(&we.com); + + if (we.rc != 0) + return -EIO; + return 0; +} + +static int viocd_packet(struct cdrom_device_info *cdi, + struct packet_command *cgc) +{ + unsigned int buflen = cgc->buflen; + int ret = -EIO; + + switch (cgc->cmd[0]) { + case GPCMD_READ_DISC_INFO: + { + disc_information *di = (disc_information *)cgc->buffer; + + if (buflen >= 2) { + di->disc_information_length = cpu_to_be16(1); + ret = 0; + } + if (buflen >= 3) + di->erasable = + (cdi->ops->capability & ~cdi->mask + & (CDC_DVD_RAM | CDC_RAM)) != 0; + } + break; + default: + if (cgc->sense) { + /* indicate Unknown code */ + cgc->sense->sense_key = 0x05; + cgc->sense->asc = 0x20; + cgc->sense->ascq = 0x00; + } + break; + } + + cgc->stat = ret; + return ret; +} + +static void restart_all_queues(int first_index) +{ + int i; + + for (i = first_index + 1; i < viocd_numdev; i++) + if (viocd_diskinfo[i].viocd_disk) + blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); + for (i = 0; i <= first_index; i++) + if (viocd_diskinfo[i].viocd_disk) + blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); +} + +/* This routine handles incoming CD LP events */ +static void vio_handle_cd_event(struct HvLpEvent *event) +{ + struct viocdlpevent *bevent; + struct viocd_waitevent *pwe; + struct disk_info *di; + unsigned long flags; + struct request *req; + + + if (event == NULL) + /* Notification that a partition went away! */ + return; + /* First, we should NEVER get an int here...only acks */ + if (event->xFlags.xFunction == HvLpEvent_Function_Int) { + printk(VIOCD_KERN_WARNING + "Yikes! got an int in viocd event handler!\n"); + if (event->xFlags.xAckInd == HvLpEvent_AckInd_DoAck) { + event->xRc = HvLpEvent_Rc_InvalidSubtype; + HvCallEvent_ackLpEvent(event); + } + } + + bevent = (struct viocdlpevent *)event; + + switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { + case viocdopen: + if (event->xRc == 0) { + di = &viocd_diskinfo[bevent->disk]; + blk_queue_hardsect_size(di->viocd_disk->queue, + bevent->block_size); + set_capacity(di->viocd_disk, + bevent->media_size * + bevent->block_size / 512); + } + /* FALLTHROUGH !! */ + case viocdgetinfo: + case viocdlockdoor: + pwe = (struct viocd_waitevent *)event->xCorrelationToken; +return_complete: + pwe->rc = event->xRc; + pwe->sub_result = bevent->sub_result; + complete(&pwe->com); + break; + + case viocdcheck: + pwe = (struct viocd_waitevent *)event->xCorrelationToken; + pwe->changed = bevent->flags; + goto return_complete; + + case viocdclose: + break; + + case viocdwrite: + case viocdread: + /* + * Since this is running in interrupt mode, we need to + * make sure we're not stepping on any global I/O operations + */ + di = &viocd_diskinfo[bevent->disk]; + spin_lock_irqsave(&viocd_reqlock, flags); + dma_unmap_single(di->dev, bevent->token, bevent->len, + ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) + ? DMA_FROM_DEVICE : DMA_TO_DEVICE); + req = (struct request *)bevent->event.xCorrelationToken; + rwreq--; + + if (event->xRc != HvLpEvent_Rc_Good) { + const struct vio_error_entry *err = + vio_lookup_rc(viocd_err_table, + bevent->sub_result); + printk(VIOCD_KERN_WARNING "request %p failed " + "with rc %d:0x%04X: %s\n", + req, event->xRc, + bevent->sub_result, err->msg); + end_request(req, 0); + } else + end_request(req, 1); + + /* restart handling of incoming requests */ + spin_unlock_irqrestore(&viocd_reqlock, flags); + restart_all_queues(bevent->disk); + break; + + default: + printk(VIOCD_KERN_WARNING + "message with invalid subtype %0x04X!\n", + event->xSubtype & VIOMINOR_SUBTYPE_MASK); + if (event->xFlags.xAckInd == HvLpEvent_AckInd_DoAck) { + event->xRc = HvLpEvent_Rc_InvalidSubtype; + HvCallEvent_ackLpEvent(event); + } + } +} + +static struct cdrom_device_ops viocd_dops = { + .open = viocd_open, + .release = viocd_release, + .media_changed = viocd_media_changed, + .lock_door = viocd_lock_door, + .generic_packet = viocd_packet, + .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET | CDC_IOCTLS | CDC_DRIVE_STATUS | CDC_GENERIC_PACKET | CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_RAM +}; + +static int __init find_capability(const char *type) +{ + struct capability_entry *entry; + + for(entry = capability_table; entry->type; ++entry) + if(!strncmp(entry->type, type, 4)) + break; + return entry->capability; +} + +static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) +{ + struct gendisk *gendisk; + int deviceno; + struct disk_info *d; + struct cdrom_device_info *c; + struct cdrom_info *ci; + struct request_queue *q; + + deviceno = vdev->unit_address; + if (deviceno >= viocd_numdev) + return -ENODEV; + + d = &viocd_diskinfo[deviceno]; + c = &d->viocd_info; + ci = &viocd_unitinfo[deviceno]; + + c->ops = &viocd_dops; + c->speed = 4; + c->capacity = 1; + c->handle = d; + c->mask = ~find_capability(ci->type); + sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); + + if (register_cdrom(c) != 0) { + printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n", + c->name); + goto out; + } + printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s " + "type %4.4s, model %3.3s\n", + c->name, ci->rsrcname, ci->type, ci->model); + q = blk_init_queue(do_viocd_request, &viocd_reqlock); + if (q == NULL) { + printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n", + c->name); + goto out_unregister_cdrom; + } + gendisk = alloc_disk(1); + if (gendisk == NULL) { + printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n", + c->name); + goto out_cleanup_queue; + } + gendisk->major = VIOCD_MAJOR; + gendisk->first_minor = deviceno; + strncpy(gendisk->disk_name, c->name, + sizeof(gendisk->disk_name)); + snprintf(gendisk->devfs_name, sizeof(gendisk->devfs_name), + VIOCD_DEVICE_DEVFS "%d", deviceno); + blk_queue_max_hw_segments(q, 1); + blk_queue_max_phys_segments(q, 1); + blk_queue_max_sectors(q, 4096 / 512); + gendisk->queue = q; + gendisk->fops = &viocd_fops; + gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; + set_capacity(gendisk, 0); + gendisk->private_data = d; + d->viocd_disk = gendisk; + d->dev = &vdev->dev; + gendisk->driverfs_dev = d->dev; + add_disk(gendisk); + return 0; + +out_cleanup_queue: + blk_cleanup_queue(q); +out_unregister_cdrom: + unregister_cdrom(c); +out: + return -ENODEV; +} + +static int viocd_remove(struct vio_dev *vdev) +{ + struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; + + if (unregister_cdrom(&d->viocd_info) != 0) + printk(VIOCD_KERN_WARNING + "Cannot unregister viocd CD-ROM %s!\n", + d->viocd_info.name); + del_gendisk(d->viocd_disk); + blk_cleanup_queue(d->viocd_disk->queue); + put_disk(d->viocd_disk); + return 0; +} + +/** + * viocd_device_table: Used by vio.c to match devices that we + * support. + */ +static struct vio_device_id viocd_device_table[] __devinitdata = { + { "viocd", "" }, + { 0, } +}; + +MODULE_DEVICE_TABLE(vio, viocd_device_table); +static struct vio_driver viocd_driver = { + .name = "viocd", + .id_table = viocd_device_table, + .probe = viocd_probe, + .remove = viocd_remove +}; + +static int __init viocd_init(void) +{ + struct proc_dir_entry *e; + int ret = 0; + + if (viopath_hostLp == HvLpIndexInvalid) { + vio_set_hostlp(); + /* If we don't have a host, bail out */ + if (viopath_hostLp == HvLpIndexInvalid) + return -ENODEV; + } + + printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n", + viopath_hostLp); + + if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { + printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n", + VIOCD_MAJOR, VIOCD_DEVICE); + return -EIO; + } + + ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, + MAX_CD_REQ + 2); + if (ret) { + printk(VIOCD_KERN_WARNING + "error opening path to host partition %d\n", + viopath_hostLp); + goto out_unregister; + } + + /* Initialize our request handler */ + vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); + + get_viocd_info(); + + spin_lock_init(&viocd_reqlock); + + ret = vio_register_driver(&viocd_driver); + if (ret) + goto out_free_info; + + e = create_proc_entry("iSeries/viocd", S_IFREG|S_IRUGO, NULL); + if (e) { + e->owner = THIS_MODULE; + e->proc_fops = &proc_viocd_operations; + } + + return 0; + +out_free_info: + dma_free_coherent(iSeries_vio_dev, + sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, + viocd_unitinfo, unitinfo_dmaaddr); + vio_clearHandler(viomajorsubtype_cdio); + viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); +out_unregister: + unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); + return ret; +} + +static void __exit viocd_exit(void) +{ + remove_proc_entry("iSeries/viocd", NULL); + vio_unregister_driver(&viocd_driver); + if (viocd_unitinfo != NULL) + dma_free_coherent(iSeries_vio_dev, + sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, + viocd_unitinfo, unitinfo_dmaaddr); + viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); + vio_clearHandler(viomajorsubtype_cdio); + unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); +} + +module_init(viocd_init); +module_exit(viocd_exit); +MODULE_LICENSE("GPL"); |