powerpc: Remove some of the legacy iSeries specific device drivers (ba7a4822) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/block/viodasd.c

deleted100644 → 0

+0 −809

Original line number	Diff line number	Diff line
		/* -- linux-c --
		* viodasd.c
		* Authors: Dave Boutcher <boutcher@us.ibm.com>
		* Ryan Arnold <ryanarn@us.ibm.com>
		* Colin Devilbiss <devilbis@us.ibm.com>
		* Stephen Rothwell
		*
		* (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) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*
		* This routine provides access to disk space (termed "DASD" in historical
		* IBM terms) owned and managed by an OS/400 partition running on the
		* same box as this Linux partition.
		*
		* All disk operations are performed by sending messages back and forth to
		* the OS/400 partition.
		*/

		#define pr_fmt(fmt) "viod: " fmt

		#include <linux/major.h>
		#include <linux/fs.h>
		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/blkdev.h>
		#include <linux/genhd.h>
		#include <linux/hdreg.h>
		#include <linux/errno.h>
		#include <linux/init.h>
		#include <linux/string.h>
		#include <linux/mutex.h>
		#include <linux/dma-mapping.h>
		#include <linux/completion.h>
		#include <linux/device.h>
		#include <linux/scatterlist.h>

		#include <asm/uaccess.h>
		#include <asm/vio.h>
		#include <asm/iseries/hv_types.h>
		#include <asm/iseries/hv_lp_event.h>
		#include <asm/iseries/hv_lp_config.h>
		#include <asm/iseries/vio.h>
		#include <asm/firmware.h>

		MODULE_DESCRIPTION("iSeries Virtual DASD");
		MODULE_AUTHOR("Dave Boutcher");
		MODULE_LICENSE("GPL");

		/*
		* We only support 7 partitions per physical disk....so with minor
		* numbers 0-255 we get a maximum of 32 disks.
		*/
		#define VIOD_GENHD_NAME "iseries/vd"

		#define VIOD_VERS "1.64"

		enum {
		PARTITION_SHIFT = 3,
		MAX_DISKNO = HVMAXARCHITECTEDVIRTUALDISKS,
		MAX_DISK_NAME = FIELD_SIZEOF(struct gendisk, disk_name)
		};

		static DEFINE_MUTEX(viodasd_mutex);
		static DEFINE_SPINLOCK(viodasd_spinlock);

		#define VIOMAXREQ 16

		#define DEVICE_NO(cell) ((struct viodasd_device *)(cell) - &viodasd_devices[0])

		struct viodasd_waitevent {
		struct completion com;
		int rc;
		u16 sub_result;
		int max_disk; /* open */
		};

		static const struct vio_error_entry viodasd_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 Disk" },
		{ 0x0207, EBUSY, "Can't Lock" },
		{ 0x0208, EIO, "Already Locked" },
		{ 0x0209, EIO, "Already Unlocked" },
		{ 0x020A, EIO, "Invalid Arg" },
		{ 0x020B, EIO, "Bad IFS File" },
		{ 0x020C, EROFS, "Read Only Device" },
		{ 0x02FF, EIO, "Internal Error" },
		{ 0x0000, 0, NULL },
		};

		/*
		* Figure out the biggest I/O request (in sectors) we can accept
		*/
		#define VIODASD_MAXSECTORS (4096 / 512 * VIOMAXBLOCKDMA)

		/*
		* Number of disk I/O requests we've sent to OS/400
		*/
		static int num_req_outstanding;

		/*
		* This is our internal structure for keeping track of disk devices
		*/
		struct viodasd_device {
		u16 cylinders;
		u16 tracks;
		u16 sectors;
		u16 bytes_per_sector;
		u64 size;
		int read_only;
		spinlock_t q_lock;
		struct gendisk *disk;
		struct device *dev;
		} viodasd_devices[MAX_DISKNO];

		/*
		* External open entry point.
		*/
		static int viodasd_open(struct block_device *bdev, fmode_t mode)
		{
		struct viodasd_device *d = bdev->bd_disk->private_data;
		HvLpEvent_Rc hvrc;
		struct viodasd_waitevent we;
		u16 flags = 0;

		if (d->read_only) {
		if (mode & FMODE_WRITE)
		return -EROFS;
		flags = vioblockflags_ro;
		}

		init_completion(&we.com);

		/* Send the open event to OS/400 */
		hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
		HvLpEvent_Type_VirtualIo,
		viomajorsubtype_blockio \| vioblockopen,
		HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
		viopath_sourceinst(viopath_hostLp),
		viopath_targetinst(viopath_hostLp),
		(u64)(unsigned long)&we, VIOVERSION << 16,
		((u64)DEVICE_NO(d) << 48) \| ((u64)flags << 32),
		0, 0, 0);
		if (hvrc != 0) {
		pr_warning("HV open failed %d\n", (int)hvrc);
		return -EIO;
		}

		wait_for_completion(&we.com);

		/* Check the return code */
		if (we.rc != 0) {
		const struct vio_error_entry *err =
		vio_lookup_rc(viodasd_err_table, we.sub_result);

		pr_warning("bad rc opening disk: %d:0x%04x (%s)\n",
		(int)we.rc, we.sub_result, err->msg);
		return -EIO;
		}

		return 0;
		}

		static int viodasd_unlocked_open(struct block_device *bdev, fmode_t mode)
		{
		int ret;

		mutex_lock(&viodasd_mutex);
		ret = viodasd_open(bdev, mode);
		mutex_unlock(&viodasd_mutex);

		return ret;
		}


		/*
		* External release entry point.
		*/
		static int viodasd_release(struct gendisk *disk, fmode_t mode)
		{
		struct viodasd_device *d = disk->private_data;
		HvLpEvent_Rc hvrc;

		mutex_lock(&viodasd_mutex);
		/* Send the event to OS/400. We DON'T expect a response */
		hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
		HvLpEvent_Type_VirtualIo,
		viomajorsubtype_blockio \| vioblockclose,
		HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
		viopath_sourceinst(viopath_hostLp),
		viopath_targetinst(viopath_hostLp),
		0, VIOVERSION << 16,
		((u64)DEVICE_NO(d) << 48) /* \| ((u64)flags << 32) */,
		0, 0, 0);
		if (hvrc != 0)
		pr_warning("HV close call failed %d\n", (int)hvrc);

		mutex_unlock(&viodasd_mutex);

		return 0;
		}


		/* External ioctl entry point.
		*/
		static int viodasd_getgeo(struct block_device bdev, struct hd_geometry geo)
		{
		struct gendisk *disk = bdev->bd_disk;
		struct viodasd_device *d = disk->private_data;

		geo->sectors = d->sectors ? d->sectors : 32;
		geo->heads = d->tracks ? d->tracks : 64;
		geo->cylinders = d->cylinders ? d->cylinders :
		get_capacity(disk) / (geo->sectors * geo->heads);

		return 0;
		}

		/*
		* Our file operations table
		*/
		static const struct block_device_operations viodasd_fops = {
		.owner = THIS_MODULE,
		.open = viodasd_unlocked_open,
		.release = viodasd_release,
		.getgeo = viodasd_getgeo,
		};

		/*
		* End a request
		*/
		static void viodasd_end_request(struct request *req, int error,
		int num_sectors)
		{
		__blk_end_request(req, error, num_sectors << 9);
		}

		/*
		* Send an actual I/O request to OS/400
		*/
		static int send_request(struct request *req)
		{
		u64 start;
		int direction;
		int nsg;
		u16 viocmd;
		HvLpEvent_Rc hvrc;
		struct vioblocklpevent *bevent;
		struct HvLpEvent *hev;
		struct scatterlist sg[VIOMAXBLOCKDMA];
		int sgindex;
		struct viodasd_device *d;
		unsigned long flags;

		start = (u64)blk_rq_pos(req) << 9;

		if (rq_data_dir(req) == READ) {
		direction = DMA_FROM_DEVICE;
		viocmd = viomajorsubtype_blockio \| vioblockread;
		} else {
		direction = DMA_TO_DEVICE;
		viocmd = viomajorsubtype_blockio \| vioblockwrite;
		}

		d = req->rq_disk->private_data;

		/* Now build the scatter-gather list */
		sg_init_table(sg, VIOMAXBLOCKDMA);
		nsg = blk_rq_map_sg(req->q, req, sg);
		nsg = dma_map_sg(d->dev, sg, nsg, direction);

		spin_lock_irqsave(&viodasd_spinlock, flags);
		num_req_outstanding++;

		/* This optimization handles a single DMA block */
		if (nsg == 1)
		hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
		HvLpEvent_Type_VirtualIo, viocmd,
		HvLpEvent_AckInd_DoAck,
		HvLpEvent_AckType_ImmediateAck,
		viopath_sourceinst(viopath_hostLp),
		viopath_targetinst(viopath_hostLp),
		(u64)(unsigned long)req, VIOVERSION << 16,
		((u64)DEVICE_NO(d) << 48), start,
		((u64)sg_dma_address(&sg[0])) << 32,
		sg_dma_len(&sg[0]));
		else {
		bevent = (struct vioblocklpevent *)
		vio_get_event_buffer(viomajorsubtype_blockio);
		if (bevent == NULL) {
		pr_warning("error allocating disk event buffer\n");
		goto error_ret;
		}

		/*
		* Now build up the actual request. Note that we store
		* the pointer to the request in the correlation
		* token so we can match the response up later
		*/
		memset(bevent, 0, sizeof(struct vioblocklpevent));
		hev = &bevent->event;
		hev->flags = HV_LP_EVENT_VALID \| HV_LP_EVENT_DO_ACK \|
		HV_LP_EVENT_INT;
		hev->xType = HvLpEvent_Type_VirtualIo;
		hev->xSubtype = viocmd;
		hev->xSourceLp = HvLpConfig_getLpIndex();
		hev->xTargetLp = viopath_hostLp;
		hev->xSizeMinus1 =
		offsetof(struct vioblocklpevent, u.rw_data.dma_info) +
		(sizeof(bevent->u.rw_data.dma_info[0]) * nsg) - 1;
		hev->xSourceInstanceId = viopath_sourceinst(viopath_hostLp);
		hev->xTargetInstanceId = viopath_targetinst(viopath_hostLp);
		hev->xCorrelationToken = (u64)req;
		bevent->version = VIOVERSION;
		bevent->disk = DEVICE_NO(d);
		bevent->u.rw_data.offset = start;

		/*
		* Copy just the dma information from the sg list
		* into the request
		*/
		for (sgindex = 0; sgindex < nsg; sgindex++) {
		bevent->u.rw_data.dma_info[sgindex].token =
		sg_dma_address(&sg[sgindex]);
		bevent->u.rw_data.dma_info[sgindex].len =
		sg_dma_len(&sg[sgindex]);
		}

		/* Send the request */
		hvrc = HvCallEvent_signalLpEvent(&bevent->event);
		vio_free_event_buffer(viomajorsubtype_blockio, bevent);
		}

		if (hvrc != HvLpEvent_Rc_Good) {
		pr_warning("error sending disk event to OS/400 (rc %d)\n",
		(int)hvrc);
		goto error_ret;
		}
		spin_unlock_irqrestore(&viodasd_spinlock, flags);
		return 0;

		error_ret:
		num_req_outstanding--;
		spin_unlock_irqrestore(&viodasd_spinlock, flags);
		dma_unmap_sg(d->dev, sg, nsg, direction);
		return -1;
		}

		/*
		* This is the external request processing routine
		*/
		static void do_viodasd_request(struct request_queue *q)
		{
		struct request *req;

		/*
		* If we already have the maximum number of requests
		* outstanding to OS/400 just bail out. We'll come
		* back later.
		*/
		while (num_req_outstanding < VIOMAXREQ) {
		req = blk_fetch_request(q);
		if (req == NULL)
		return;
		/* check that request contains a valid command */
		if (req->cmd_type != REQ_TYPE_FS) {
		viodasd_end_request(req, -EIO, blk_rq_sectors(req));
		continue;
		}
		/* Try sending the request */
		if (send_request(req) != 0)
		viodasd_end_request(req, -EIO, blk_rq_sectors(req));
		}
		}

		/*
		* Probe a single disk and fill in the viodasd_device structure
		* for it.
		*/
		static int probe_disk(struct viodasd_device *d)
		{
		HvLpEvent_Rc hvrc;
		struct viodasd_waitevent we;
		int dev_no = DEVICE_NO(d);
		struct gendisk *g;
		struct request_queue *q;
		u16 flags = 0;

		retry:
		init_completion(&we.com);

		/* Send the open event to OS/400 */
		hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
		HvLpEvent_Type_VirtualIo,
		viomajorsubtype_blockio \| vioblockopen,
		HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
		viopath_sourceinst(viopath_hostLp),
		viopath_targetinst(viopath_hostLp),
		(u64)(unsigned long)&we, VIOVERSION << 16,
		((u64)dev_no << 48) \| ((u64)flags<< 32),
		0, 0, 0);
		if (hvrc != 0) {
		pr_warning("bad rc on HV open %d\n", (int)hvrc);
		return 0;
		}

		wait_for_completion(&we.com);

		if (we.rc != 0) {
		if (flags != 0)
		return 0;
		/* try again with read only flag set */
		flags = vioblockflags_ro;
		goto retry;
		}
		if (we.max_disk > (MAX_DISKNO - 1)) {
		printk_once(KERN_INFO pr_fmt("Only examining the first %d of %d disks connected\n"),
		MAX_DISKNO, we.max_disk + 1);
		}

		/* Send the close event to OS/400. We DON'T expect a response */
		hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
		HvLpEvent_Type_VirtualIo,
		viomajorsubtype_blockio \| vioblockclose,
		HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
		viopath_sourceinst(viopath_hostLp),
		viopath_targetinst(viopath_hostLp),
		0, VIOVERSION << 16,
		((u64)dev_no << 48) \| ((u64)flags << 32),
		0, 0, 0);
		if (hvrc != 0) {
		pr_warning("bad rc sending event to OS/400 %d\n", (int)hvrc);
		return 0;
		}

		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);

drivers/cdrom/viocd.c

deleted100644 → 0

+0 −739

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drivers/char/viotape.c

deleted100644 → 0

+0 −1041

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