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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/cdrom/viocd.c
downloadlinaro-lsk-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/cdrom/viocd.c')
-rw-r--r--drivers/cdrom/viocd.c809
1 files changed, 809 insertions, 0 deletions
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
new file mode 100644
index 00000000000..fcca26c89bb
--- /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");