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authorStephen Rothwell <sfr@canb.auug.org.au>2012-03-08 08:32:52 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-03-16 02:28:05 +0400
commitba7a4822b48fbc7afd6b567c18e316a03f46684d (patch)
treec9a14c300a21b0db0f1aaccbd295f93420420d37 /drivers/block/viodasd.c
parentaba0eb84c87928992c021d33ef3ea59c931086b9 (diff)
downloadlinux-ba7a4822b48fbc7afd6b567c18e316a03f46684d.tar.xz
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 <axboe@kernel.dk> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/block/viodasd.c')
-rw-r--r--drivers/block/viodasd.c809
1 files changed, 0 insertions, 809 deletions
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
deleted file mode 100644
index 9a5b2a2d616d..000000000000
--- a/drivers/block/viodasd.c
+++ /dev/null
@@ -1,809 +0,0 @@
-/* -*- 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);