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powerpc: Remove some of the legacy iSeries specific device drivers
These drivers are specific to the PowerPC legacy iSeries platform and their Kconfig is specified in arch/powerpc. Legacy iSeries is being removed, so these drivers can no longer be selected. Cc: Jens Axboe <[email protected]> Signed-off-by: Stephen Rothwell <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
This commit is contained in:
Stephen Rothwell
Benjamin Herrenschmidt
parent
aba0eb84c8
commit
ba7a4822b4
3 changed files with 0 additions and 2589 deletions
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@ -1,809 +0,0 @@
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/* -*- linux-c -*-
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* viodasd.c
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* Authors: Dave Boutcher <boutcher@us.ibm.com>
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* Ryan Arnold <ryanarn@us.ibm.com>
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* Colin Devilbiss <devilbis@us.ibm.com>
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* Stephen Rothwell
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*
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* (C) Copyright 2000-2004 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This routine provides access to disk space (termed "DASD" in historical
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* IBM terms) owned and managed by an OS/400 partition running on the
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* same box as this Linux partition.
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*
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* All disk operations are performed by sending messages back and forth to
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* the OS/400 partition.
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*/
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#define pr_fmt(fmt) "viod: " fmt
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#include <linux/major.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/blkdev.h>
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#include <linux/genhd.h>
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#include <linux/hdreg.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/mutex.h>
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#include <linux/dma-mapping.h>
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/scatterlist.h>
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#include <asm/uaccess.h>
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#include <asm/vio.h>
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#include <asm/iseries/hv_types.h>
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#include <asm/iseries/hv_lp_event.h>
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#include <asm/iseries/hv_lp_config.h>
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#include <asm/iseries/vio.h>
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#include <asm/firmware.h>
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MODULE_DESCRIPTION("iSeries Virtual DASD");
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MODULE_AUTHOR("Dave Boutcher");
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MODULE_LICENSE("GPL");
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/*
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* We only support 7 partitions per physical disk....so with minor
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* numbers 0-255 we get a maximum of 32 disks.
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*/
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#define VIOD_GENHD_NAME "iseries/vd"
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#define VIOD_VERS "1.64"
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enum {
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PARTITION_SHIFT = 3,
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MAX_DISKNO = HVMAXARCHITECTEDVIRTUALDISKS,
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MAX_DISK_NAME = FIELD_SIZEOF(struct gendisk, disk_name)
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};
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static DEFINE_MUTEX(viodasd_mutex);
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static DEFINE_SPINLOCK(viodasd_spinlock);
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#define VIOMAXREQ 16
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#define DEVICE_NO(cell) ((struct viodasd_device *)(cell) - &viodasd_devices[0])
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struct viodasd_waitevent {
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struct completion com;
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int rc;
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u16 sub_result;
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int max_disk; /* open */
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};
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static const struct vio_error_entry viodasd_err_table[] = {
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{ 0x0201, EINVAL, "Invalid Range" },
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{ 0x0202, EINVAL, "Invalid Token" },
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{ 0x0203, EIO, "DMA Error" },
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{ 0x0204, EIO, "Use Error" },
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{ 0x0205, EIO, "Release Error" },
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{ 0x0206, EINVAL, "Invalid Disk" },
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{ 0x0207, EBUSY, "Can't Lock" },
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{ 0x0208, EIO, "Already Locked" },
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{ 0x0209, EIO, "Already Unlocked" },
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{ 0x020A, EIO, "Invalid Arg" },
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{ 0x020B, EIO, "Bad IFS File" },
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{ 0x020C, EROFS, "Read Only Device" },
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{ 0x02FF, EIO, "Internal Error" },
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{ 0x0000, 0, NULL },
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};
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/*
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* Figure out the biggest I/O request (in sectors) we can accept
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*/
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#define VIODASD_MAXSECTORS (4096 / 512 * VIOMAXBLOCKDMA)
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/*
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* Number of disk I/O requests we've sent to OS/400
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*/
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static int num_req_outstanding;
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/*
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* This is our internal structure for keeping track of disk devices
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*/
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struct viodasd_device {
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u16 cylinders;
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u16 tracks;
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u16 sectors;
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u16 bytes_per_sector;
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u64 size;
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int read_only;
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spinlock_t q_lock;
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struct gendisk *disk;
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struct device *dev;
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} viodasd_devices[MAX_DISKNO];
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/*
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* External open entry point.
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*/
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static int viodasd_open(struct block_device *bdev, fmode_t mode)
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{
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struct viodasd_device *d = bdev->bd_disk->private_data;
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HvLpEvent_Rc hvrc;
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struct viodasd_waitevent we;
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u16 flags = 0;
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if (d->read_only) {
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if (mode & FMODE_WRITE)
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return -EROFS;
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flags = vioblockflags_ro;
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}
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init_completion(&we.com);
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/* Send the open event to OS/400 */
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_blockio | vioblockopen,
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HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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(u64)(unsigned long)&we, VIOVERSION << 16,
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((u64)DEVICE_NO(d) << 48) | ((u64)flags << 32),
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0, 0, 0);
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if (hvrc != 0) {
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pr_warning("HV open failed %d\n", (int)hvrc);
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return -EIO;
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}
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wait_for_completion(&we.com);
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/* Check the return code */
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if (we.rc != 0) {
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const struct vio_error_entry *err =
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vio_lookup_rc(viodasd_err_table, we.sub_result);
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pr_warning("bad rc opening disk: %d:0x%04x (%s)\n",
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(int)we.rc, we.sub_result, err->msg);
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return -EIO;
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}
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return 0;
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}
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static int viodasd_unlocked_open(struct block_device *bdev, fmode_t mode)
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{
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int ret;
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mutex_lock(&viodasd_mutex);
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ret = viodasd_open(bdev, mode);
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mutex_unlock(&viodasd_mutex);
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return ret;
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}
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/*
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* External release entry point.
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*/
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static int viodasd_release(struct gendisk *disk, fmode_t mode)
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{
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struct viodasd_device *d = disk->private_data;
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HvLpEvent_Rc hvrc;
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mutex_lock(&viodasd_mutex);
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/* Send the event to OS/400. We DON'T expect a response */
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_blockio | vioblockclose,
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HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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0, VIOVERSION << 16,
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((u64)DEVICE_NO(d) << 48) /* | ((u64)flags << 32) */,
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0, 0, 0);
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if (hvrc != 0)
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pr_warning("HV close call failed %d\n", (int)hvrc);
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mutex_unlock(&viodasd_mutex);
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return 0;
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}
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/* External ioctl entry point.
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*/
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static int viodasd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
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{
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struct gendisk *disk = bdev->bd_disk;
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struct viodasd_device *d = disk->private_data;
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geo->sectors = d->sectors ? d->sectors : 32;
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geo->heads = d->tracks ? d->tracks : 64;
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geo->cylinders = d->cylinders ? d->cylinders :
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get_capacity(disk) / (geo->sectors * geo->heads);
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return 0;
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}
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/*
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* Our file operations table
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*/
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static const struct block_device_operations viodasd_fops = {
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.owner = THIS_MODULE,
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.open = viodasd_unlocked_open,
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.release = viodasd_release,
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.getgeo = viodasd_getgeo,
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};
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/*
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* End a request
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*/
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static void viodasd_end_request(struct request *req, int error,
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int num_sectors)
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{
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__blk_end_request(req, error, num_sectors << 9);
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}
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/*
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* Send an actual I/O request to OS/400
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*/
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static int send_request(struct request *req)
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{
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u64 start;
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int direction;
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int nsg;
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u16 viocmd;
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HvLpEvent_Rc hvrc;
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struct vioblocklpevent *bevent;
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struct HvLpEvent *hev;
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struct scatterlist sg[VIOMAXBLOCKDMA];
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int sgindex;
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struct viodasd_device *d;
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unsigned long flags;
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start = (u64)blk_rq_pos(req) << 9;
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if (rq_data_dir(req) == READ) {
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direction = DMA_FROM_DEVICE;
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viocmd = viomajorsubtype_blockio | vioblockread;
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} else {
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direction = DMA_TO_DEVICE;
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viocmd = viomajorsubtype_blockio | vioblockwrite;
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}
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d = req->rq_disk->private_data;
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/* Now build the scatter-gather list */
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sg_init_table(sg, VIOMAXBLOCKDMA);
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nsg = blk_rq_map_sg(req->q, req, sg);
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nsg = dma_map_sg(d->dev, sg, nsg, direction);
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spin_lock_irqsave(&viodasd_spinlock, flags);
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num_req_outstanding++;
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/* This optimization handles a single DMA block */
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if (nsg == 1)
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo, viocmd,
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HvLpEvent_AckInd_DoAck,
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HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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(u64)(unsigned long)req, VIOVERSION << 16,
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((u64)DEVICE_NO(d) << 48), start,
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((u64)sg_dma_address(&sg[0])) << 32,
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sg_dma_len(&sg[0]));
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else {
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bevent = (struct vioblocklpevent *)
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vio_get_event_buffer(viomajorsubtype_blockio);
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if (bevent == NULL) {
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pr_warning("error allocating disk event buffer\n");
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goto error_ret;
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}
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/*
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* Now build up the actual request. Note that we store
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* the pointer to the request in the correlation
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* token so we can match the response up later
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*/
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memset(bevent, 0, sizeof(struct vioblocklpevent));
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hev = &bevent->event;
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hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DO_ACK |
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HV_LP_EVENT_INT;
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hev->xType = HvLpEvent_Type_VirtualIo;
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hev->xSubtype = viocmd;
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hev->xSourceLp = HvLpConfig_getLpIndex();
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hev->xTargetLp = viopath_hostLp;
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hev->xSizeMinus1 =
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offsetof(struct vioblocklpevent, u.rw_data.dma_info) +
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(sizeof(bevent->u.rw_data.dma_info[0]) * nsg) - 1;
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hev->xSourceInstanceId = viopath_sourceinst(viopath_hostLp);
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hev->xTargetInstanceId = viopath_targetinst(viopath_hostLp);
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hev->xCorrelationToken = (u64)req;
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bevent->version = VIOVERSION;
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bevent->disk = DEVICE_NO(d);
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bevent->u.rw_data.offset = start;
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/*
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* Copy just the dma information from the sg list
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* into the request
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*/
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for (sgindex = 0; sgindex < nsg; sgindex++) {
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bevent->u.rw_data.dma_info[sgindex].token =
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sg_dma_address(&sg[sgindex]);
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bevent->u.rw_data.dma_info[sgindex].len =
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sg_dma_len(&sg[sgindex]);
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}
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/* Send the request */
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hvrc = HvCallEvent_signalLpEvent(&bevent->event);
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vio_free_event_buffer(viomajorsubtype_blockio, bevent);
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}
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if (hvrc != HvLpEvent_Rc_Good) {
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pr_warning("error sending disk event to OS/400 (rc %d)\n",
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(int)hvrc);
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goto error_ret;
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}
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spin_unlock_irqrestore(&viodasd_spinlock, flags);
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return 0;
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error_ret:
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num_req_outstanding--;
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spin_unlock_irqrestore(&viodasd_spinlock, flags);
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dma_unmap_sg(d->dev, sg, nsg, direction);
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return -1;
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}
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/*
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* This is the external request processing routine
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*/
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static void do_viodasd_request(struct request_queue *q)
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{
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struct request *req;
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/*
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* If we already have the maximum number of requests
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* outstanding to OS/400 just bail out. We'll come
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* back later.
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*/
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while (num_req_outstanding < VIOMAXREQ) {
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req = blk_fetch_request(q);
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if (req == NULL)
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return;
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/* check that request contains a valid command */
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if (req->cmd_type != REQ_TYPE_FS) {
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viodasd_end_request(req, -EIO, blk_rq_sectors(req));
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continue;
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}
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/* Try sending the request */
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if (send_request(req) != 0)
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viodasd_end_request(req, -EIO, blk_rq_sectors(req));
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}
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}
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/*
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* Probe a single disk and fill in the viodasd_device structure
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* for it.
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*/
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static int probe_disk(struct viodasd_device *d)
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{
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HvLpEvent_Rc hvrc;
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struct viodasd_waitevent we;
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int dev_no = DEVICE_NO(d);
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struct gendisk *g;
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struct request_queue *q;
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u16 flags = 0;
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retry:
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init_completion(&we.com);
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/* Send the open event to OS/400 */
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_blockio | vioblockopen,
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HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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(u64)(unsigned long)&we, VIOVERSION << 16,
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((u64)dev_no << 48) | ((u64)flags<< 32),
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0, 0, 0);
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if (hvrc != 0) {
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pr_warning("bad rc on HV open %d\n", (int)hvrc);
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return 0;
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}
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|
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wait_for_completion(&we.com);
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|
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if (we.rc != 0) {
|
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if (flags != 0)
|
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return 0;
|
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/* try again with read only flag set */
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flags = vioblockflags_ro;
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goto retry;
|
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}
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if (we.max_disk > (MAX_DISKNO - 1)) {
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printk_once(KERN_INFO pr_fmt("Only examining the first %d of %d disks connected\n"),
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MAX_DISKNO, we.max_disk + 1);
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}
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|
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/* Send the close event to OS/400. We DON'T expect a response */
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
|
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HvLpEvent_Type_VirtualIo,
|
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viomajorsubtype_blockio | vioblockclose,
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HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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0, VIOVERSION << 16,
|
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((u64)dev_no << 48) | ((u64)flags << 32),
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0, 0, 0);
|
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if (hvrc != 0) {
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pr_warning("bad rc sending event to OS/400 %d\n", (int)hvrc);
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return 0;
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}
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||||
|
||||
if (d->dev == NULL) {
|
||||
/* this is when we reprobe for new disks */
|
||||
if (vio_create_viodasd(dev_no) == NULL) {
|
||||
pr_warning("cannot allocate virtual device for disk %d\n",
|
||||
dev_no);
|
||||
return 0;
|
||||
}
|
||||
/*
|
||||
* The vio_create_viodasd will have recursed into this
|
||||
* routine with d->dev set to the new vio device and
|
||||
* will finish the setup of the disk below.
|
||||
*/
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* create the request queue for the disk */
|
||||
spin_lock_init(&d->q_lock);
|
||||
q = blk_init_queue(do_viodasd_request, &d->q_lock);
|
||||
if (q == NULL) {
|
||||
pr_warning("cannot allocate queue for disk %d\n", dev_no);
|
||||
return 0;
|
||||
}
|
||||
g = alloc_disk(1 << PARTITION_SHIFT);
|
||||
if (g == NULL) {
|
||||
pr_warning("cannot allocate disk structure for disk %d\n",
|
||||
dev_no);
|
||||
blk_cleanup_queue(q);
|
||||
return 0;
|
||||
}
|
||||
|
||||
d->disk = g;
|
||||
blk_queue_max_segments(q, VIOMAXBLOCKDMA);
|
||||
blk_queue_max_hw_sectors(q, VIODASD_MAXSECTORS);
|
||||
g->major = VIODASD_MAJOR;
|
||||
g->first_minor = dev_no << PARTITION_SHIFT;
|
||||
if (dev_no >= 26)
|
||||
snprintf(g->disk_name, sizeof(g->disk_name),
|
||||
VIOD_GENHD_NAME "%c%c",
|
||||
'a' + (dev_no / 26) - 1, 'a' + (dev_no % 26));
|
||||
else
|
||||
snprintf(g->disk_name, sizeof(g->disk_name),
|
||||
VIOD_GENHD_NAME "%c", 'a' + (dev_no % 26));
|
||||
g->fops = &viodasd_fops;
|
||||
g->queue = q;
|
||||
g->private_data = d;
|
||||
g->driverfs_dev = d->dev;
|
||||
set_capacity(g, d->size >> 9);
|
||||
|
||||
pr_info("disk %d: %lu sectors (%lu MB) CHS=%d/%d/%d sector size %d%s\n",
|
||||
dev_no, (unsigned long)(d->size >> 9),
|
||||
(unsigned long)(d->size >> 20),
|
||||
(int)d->cylinders, (int)d->tracks,
|
||||
(int)d->sectors, (int)d->bytes_per_sector,
|
||||
d->read_only ? " (RO)" : "");
|
||||
|
||||
/* register us in the global list */
|
||||
add_disk(g);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* returns the total number of scatterlist elements converted */
|
||||
static int block_event_to_scatterlist(const struct vioblocklpevent *bevent,
|
||||
struct scatterlist *sg, int *total_len)
|
||||
{
|
||||
int i, numsg;
|
||||
const struct rw_data *rw_data = &bevent->u.rw_data;
|
||||
static const int offset =
|
||||
offsetof(struct vioblocklpevent, u.rw_data.dma_info);
|
||||
static const int element_size = sizeof(rw_data->dma_info[0]);
|
||||
|
||||
numsg = ((bevent->event.xSizeMinus1 + 1) - offset) / element_size;
|
||||
if (numsg > VIOMAXBLOCKDMA)
|
||||
numsg = VIOMAXBLOCKDMA;
|
||||
|
||||
*total_len = 0;
|
||||
sg_init_table(sg, VIOMAXBLOCKDMA);
|
||||
for (i = 0; (i < numsg) && (rw_data->dma_info[i].len > 0); ++i) {
|
||||
sg_dma_address(&sg[i]) = rw_data->dma_info[i].token;
|
||||
sg_dma_len(&sg[i]) = rw_data->dma_info[i].len;
|
||||
*total_len += rw_data->dma_info[i].len;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
/*
|
||||
* Restart all queues, starting with the one _after_ the disk given,
|
||||
* thus reducing the chance of starvation of higher numbered disks.
|
||||
*/
|
||||
static void viodasd_restart_all_queues_starting_from(int first_index)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = first_index + 1; i < MAX_DISKNO; ++i)
|
||||
if (viodasd_devices[i].disk)
|
||||
blk_run_queue(viodasd_devices[i].disk->queue);
|
||||
for (i = 0; i <= first_index; ++i)
|
||||
if (viodasd_devices[i].disk)
|
||||
blk_run_queue(viodasd_devices[i].disk->queue);
|
||||
}
|
||||
|
||||
/*
|
||||
* For read and write requests, decrement the number of outstanding requests,
|
||||
* Free the DMA buffers we allocated.
|
||||
*/
|
||||
static int viodasd_handle_read_write(struct vioblocklpevent *bevent)
|
||||
{
|
||||
int num_sg, num_sect, pci_direction, total_len;
|
||||
struct request *req;
|
||||
struct scatterlist sg[VIOMAXBLOCKDMA];
|
||||
struct HvLpEvent *event = &bevent->event;
|
||||
unsigned long irq_flags;
|
||||
struct viodasd_device *d;
|
||||
int error;
|
||||
spinlock_t *qlock;
|
||||
|
||||
num_sg = block_event_to_scatterlist(bevent, sg, &total_len);
|
||||
num_sect = total_len >> 9;
|
||||
if (event->xSubtype == (viomajorsubtype_blockio | vioblockread))
|
||||
pci_direction = DMA_FROM_DEVICE;
|
||||
else
|
||||
pci_direction = DMA_TO_DEVICE;
|
||||
req = (struct request *)bevent->event.xCorrelationToken;
|
||||
d = req->rq_disk->private_data;
|
||||
|
||||
dma_unmap_sg(d->dev, sg, num_sg, pci_direction);
|
||||
|
||||
/*
|
||||
* Since this is running in interrupt mode, we need to make sure
|
||||
* we're not stepping on any global I/O operations
|
||||
*/
|
||||
spin_lock_irqsave(&viodasd_spinlock, irq_flags);
|
||||
num_req_outstanding--;
|
||||
spin_unlock_irqrestore(&viodasd_spinlock, irq_flags);
|
||||
|
||||
error = (event->xRc == HvLpEvent_Rc_Good) ? 0 : -EIO;
|
||||
if (error) {
|
||||
const struct vio_error_entry *err;
|
||||
err = vio_lookup_rc(viodasd_err_table, bevent->sub_result);
|
||||
pr_warning("read/write error %d:0x%04x (%s)\n",
|
||||
event->xRc, bevent->sub_result, err->msg);
|
||||
num_sect = blk_rq_sectors(req);
|
||||
}
|
||||
qlock = req->q->queue_lock;
|
||||
spin_lock_irqsave(qlock, irq_flags);
|
||||
viodasd_end_request(req, error, num_sect);
|
||||
spin_unlock_irqrestore(qlock, irq_flags);
|
||||
|
||||
/* Finally, try to get more requests off of this device's queue */
|
||||
viodasd_restart_all_queues_starting_from(DEVICE_NO(d));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* This routine handles incoming block LP events */
|
||||
static void handle_block_event(struct HvLpEvent *event)
|
||||
{
|
||||
struct vioblocklpevent *bevent = (struct vioblocklpevent *)event;
|
||||
struct viodasd_waitevent *pwe;
|
||||
|
||||
if (event == NULL)
|
||||
/* Notification that a partition went away! */
|
||||
return;
|
||||
/* First, we should NEVER get an int here...only acks */
|
||||
if (hvlpevent_is_int(event)) {
|
||||
pr_warning("Yikes! got an int in viodasd event handler!\n");
|
||||
if (hvlpevent_need_ack(event)) {
|
||||
event->xRc = HvLpEvent_Rc_InvalidSubtype;
|
||||
HvCallEvent_ackLpEvent(event);
|
||||
}
|
||||
}
|
||||
|
||||
switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
|
||||
case vioblockopen:
|
||||
/*
|
||||
* Handle a response to an open request. We get all the
|
||||
* disk information in the response, so update it. The
|
||||
* correlation token contains a pointer to a waitevent
|
||||
* structure that has a completion in it. update the
|
||||
* return code in the waitevent structure and post the
|
||||
* completion to wake up the guy who sent the request
|
||||
*/
|
||||
pwe = (struct viodasd_waitevent *)event->xCorrelationToken;
|
||||
pwe->rc = event->xRc;
|
||||
pwe->sub_result = bevent->sub_result;
|
||||
if (event->xRc == HvLpEvent_Rc_Good) {
|
||||
const struct open_data *data = &bevent->u.open_data;
|
||||
struct viodasd_device *device =
|
||||
&viodasd_devices[bevent->disk];
|
||||
device->read_only =
|
||||
bevent->flags & vioblockflags_ro;
|
||||
device->size = data->disk_size;
|
||||
device->cylinders = data->cylinders;
|
||||
device->tracks = data->tracks;
|
||||
device->sectors = data->sectors;
|
||||
device->bytes_per_sector = data->bytes_per_sector;
|
||||
pwe->max_disk = data->max_disk;
|
||||
}
|
||||
complete(&pwe->com);
|
||||
break;
|
||||
case vioblockclose:
|
||||
break;
|
||||
case vioblockread:
|
||||
case vioblockwrite:
|
||||
viodasd_handle_read_write(bevent);
|
||||
break;
|
||||
|
||||
default:
|
||||
pr_warning("invalid subtype!");
|
||||
if (hvlpevent_need_ack(event)) {
|
||||
event->xRc = HvLpEvent_Rc_InvalidSubtype;
|
||||
HvCallEvent_ackLpEvent(event);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Get the driver to reprobe for more disks.
|
||||
*/
|
||||
static ssize_t probe_disks(struct device_driver *drv, const char *buf,
|
||||
size_t count)
|
||||
{
|
||||
struct viodasd_device *d;
|
||||
|
||||
for (d = viodasd_devices; d < &viodasd_devices[MAX_DISKNO]; d++) {
|
||||
if (d->disk == NULL)
|
||||
probe_disk(d);
|
||||
}
|
||||
return count;
|
||||
}
|
||||
static DRIVER_ATTR(probe, S_IWUSR, NULL, probe_disks);
|
||||
|
||||
static int viodasd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
||||
{
|
||||
struct viodasd_device *d = &viodasd_devices[vdev->unit_address];
|
||||
|
||||
d->dev = &vdev->dev;
|
||||
if (!probe_disk(d))
|
||||
return -ENODEV;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int viodasd_remove(struct vio_dev *vdev)
|
||||
{
|
||||
struct viodasd_device *d;
|
||||
|
||||
d = &viodasd_devices[vdev->unit_address];
|
||||
if (d->disk) {
|
||||
del_gendisk(d->disk);
|
||||
blk_cleanup_queue(d->disk->queue);
|
||||
put_disk(d->disk);
|
||||
d->disk = NULL;
|
||||
}
|
||||
d->dev = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* viodasd_device_table: Used by vio.c to match devices that we
|
||||
* support.
|
||||
*/
|
||||
static struct vio_device_id viodasd_device_table[] __devinitdata = {
|
||||
{ "block", "IBM,iSeries-viodasd" },
|
||||
{ "", "" }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(vio, viodasd_device_table);
|
||||
|
||||
static struct vio_driver viodasd_driver = {
|
||||
.id_table = viodasd_device_table,
|
||||
.probe = viodasd_probe,
|
||||
.remove = viodasd_remove,
|
||||
.driver = {
|
||||
.name = "viodasd",
|
||||
.owner = THIS_MODULE,
|
||||
}
|
||||
};
|
||||
|
||||
static int need_delete_probe;
|
||||
|
||||
/*
|
||||
* Initialize the whole device driver. Handle module and non-module
|
||||
* versions
|
||||
*/
|
||||
static int __init viodasd_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (!firmware_has_feature(FW_FEATURE_ISERIES)) {
|
||||
rc = -ENODEV;
|
||||
goto early_fail;
|
||||
}
|
||||
|
||||
/* Try to open to our host lp */
|
||||
if (viopath_hostLp == HvLpIndexInvalid)
|
||||
vio_set_hostlp();
|
||||
|
||||
if (viopath_hostLp == HvLpIndexInvalid) {
|
||||
pr_warning("invalid hosting partition\n");
|
||||
rc = -EIO;
|
||||
goto early_fail;
|
||||
}
|
||||
|
||||
pr_info("vers " VIOD_VERS ", hosting partition %d\n", viopath_hostLp);
|
||||
|
||||
/* register the block device */
|
||||
rc = register_blkdev(VIODASD_MAJOR, VIOD_GENHD_NAME);
|
||||
if (rc) {
|
||||
pr_warning("Unable to get major number %d for %s\n",
|
||||
VIODASD_MAJOR, VIOD_GENHD_NAME);
|
||||
goto early_fail;
|
||||
}
|
||||
/* Actually open the path to the hosting partition */
|
||||
rc = viopath_open(viopath_hostLp, viomajorsubtype_blockio,
|
||||
VIOMAXREQ + 2);
|
||||
if (rc) {
|
||||
pr_warning("error opening path to host partition %d\n",
|
||||
viopath_hostLp);
|
||||
goto unregister_blk;
|
||||
}
|
||||
|
||||
/* Initialize our request handler */
|
||||
vio_setHandler(viomajorsubtype_blockio, handle_block_event);
|
||||
|
||||
rc = vio_register_driver(&viodasd_driver);
|
||||
if (rc) {
|
||||
pr_warning("vio_register_driver failed\n");
|
||||
goto unset_handler;
|
||||
}
|
||||
|
||||
/*
|
||||
* If this call fails, it just means that we cannot dynamically
|
||||
* add virtual disks, but the driver will still work fine for
|
||||
* all existing disk, so ignore the failure.
|
||||
*/
|
||||
if (!driver_create_file(&viodasd_driver.driver, &driver_attr_probe))
|
||||
need_delete_probe = 1;
|
||||
|
||||
return 0;
|
||||
|
||||
unset_handler:
|
||||
vio_clearHandler(viomajorsubtype_blockio);
|
||||
viopath_close(viopath_hostLp, viomajorsubtype_blockio, VIOMAXREQ + 2);
|
||||
unregister_blk:
|
||||
unregister_blkdev(VIODASD_MAJOR, VIOD_GENHD_NAME);
|
||||
early_fail:
|
||||
return rc;
|
||||
}
|
||||
module_init(viodasd_init);
|
||||
|
||||
void __exit viodasd_exit(void)
|
||||
{
|
||||
if (need_delete_probe)
|
||||
driver_remove_file(&viodasd_driver.driver, &driver_attr_probe);
|
||||
vio_unregister_driver(&viodasd_driver);
|
||||
vio_clearHandler(viomajorsubtype_blockio);
|
||||
viopath_close(viopath_hostLp, viomajorsubtype_blockio, VIOMAXREQ + 2);
|
||||
unregister_blkdev(VIODASD_MAJOR, VIOD_GENHD_NAME);
|
||||
}
|
||||
module_exit(viodasd_exit);
|
||||
Loading…
Reference in a new issue