diff options
| -rw-r--r-- | drivers/block/viodasd.c | 809 | ||||
| -rw-r--r-- | drivers/cdrom/viocd.c | 739 | ||||
| -rw-r--r-- | drivers/char/viotape.c | 1041 |
3 files changed, 0 insertions, 2589 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); diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c deleted file mode 100644 index 7878da89d29e..000000000000 --- a/drivers/cdrom/viocd.c +++ /dev/null @@ -1,739 +0,0 @@ -/* -*- 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 - * - * (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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#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/mutex.h> -#include <linux/seq_file.h> -#include <linux/scatterlist.h> - -#include <asm/vio.h> -#include <asm/iseries/hv_types.h> -#include <asm/iseries/hv_lp_event.h> -#include <asm/iseries/vio.h> -#include <asm/firmware.h> - -#define VIOCD_DEVICE "iseries/vcd" - -#define VIOCD_VERS "1.06" - -/* - * Should probably make this a module parameter....sigh - */ -#define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS - -static DEFINE_MUTEX(viocd_mutex); -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 disk_info { - struct gendisk *viocd_disk; - struct cdrom_device_info viocd_info; - struct device *dev; - const char *rsrcname; - const char *type; - const char *model; -}; -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_diskinfo[i].rsrcname, - viocd_diskinfo[i].type, - viocd_diskinfo[i].model); - } - return 0; -} - -static int proc_viocd_open(struct inode *inode, struct file *file) -{ - return single_open(file, proc_viocd_show, NULL); -} - -static const struct file_operations proc_viocd_operations = { - .owner = THIS_MODULE, - .open = proc_viocd_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int viocd_blk_open(struct block_device *bdev, fmode_t mode) -{ - struct disk_info *di = bdev->bd_disk->private_data; - int ret; - - mutex_lock(&viocd_mutex); - ret = cdrom_open(&di->viocd_info, bdev, mode); - mutex_unlock(&viocd_mutex); - - return ret; -} - -static int viocd_blk_release(struct gendisk *disk, fmode_t mode) -{ - struct disk_info *di = disk->private_data; - mutex_lock(&viocd_mutex); - cdrom_release(&di->viocd_info, mode); - mutex_unlock(&viocd_mutex); - return 0; -} - -static int viocd_blk_ioctl(struct block_device *bdev, fmode_t mode, - unsigned cmd, unsigned long arg) -{ - struct disk_info *di = bdev->bd_disk->private_data; - int ret; - - mutex_lock(&viocd_mutex); - ret = cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg); - mutex_unlock(&viocd_mutex); - - return ret; -} - -static unsigned int viocd_blk_check_events(struct gendisk *disk, - unsigned int clearing) -{ - struct disk_info *di = disk->private_data; - return cdrom_check_events(&di->viocd_info, clearing); -} - -static const struct block_device_operations viocd_fops = { - .owner = THIS_MODULE, - .open = viocd_blk_open, - .release = viocd_blk_release, - .ioctl = viocd_blk_ioctl, - .check_events = viocd_blk_check_events, -}; - -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) { - pr_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); - pr_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) - pr_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; - } - - sg_init_table(&sg, 1); - if (blk_rq_map_sg(req->q, req, &sg) == 0) { - pr_warning("error setting up scatter/gather list\n"); - return -1; - } - - if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { - pr_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)blk_rq_pos(req) * 512, len, 0); - if (hvrc != HvLpEvent_Rc_Good) { - pr_warning("hv error on op %d\n", (int)hvrc); - return -1; - } - - return 0; -} - -static int rwreq; - -static void do_viocd_request(struct request_queue *q) -{ - struct request *req; - - while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) { - if (req->cmd_type != REQ_TYPE_FS) - __blk_end_request_all(req, -EIO); - else if (send_request(req) < 0) { - pr_warning("unable to send message to OS/400!\n"); - __blk_end_request_all(req, -EIO); - } else - rwreq++; - } -} - -static unsigned int viocd_check_events(struct cdrom_device_info *cdi, - unsigned int clearing, 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) { - pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n", - (int)hvrc); - return 0; - } - - 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); - pr_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 ? DISK_EVENT_MEDIA_CHANGE : 0; -} - -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) { - pr_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; - case GPCMD_GET_CONFIGURATION: - if (cgc->cmd[3] == CDF_RWRT) { - struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); - - if ((buflen >= - (sizeof(struct feature_header) + sizeof(*rfd))) && - (cdi->ops->capability & ~cdi->mask - & (CDC_DVD_RAM | CDC_RAM))) { - rfd->feature_code = cpu_to_be16(CDF_RWRT); - rfd->curr = 1; - ret = 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 (hvlpevent_is_int(event)) { - pr_warning("Yikes! got an int in viocd event handler!\n"); - if (hvlpevent_need_ack(event)) { - 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_logical_block_size(di->viocd_disk->queue, - bevent->block_size); - set_capacity(di->viocd_disk, - bevent->media_size * - bevent->block_size / 512); - } - /* FALLTHROUGH !! */ - 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); - pr_warning("request %p failed with rc %d:0x%04X: %s\n", - req, event->xRc, - bevent->sub_result, err->msg); - __blk_end_request_all(req, -EIO); - } else - __blk_end_request_all(req, 0); - - /* restart handling of incoming requests */ - spin_unlock_irqrestore(&viocd_reqlock, flags); - restart_all_queues(bevent->disk); - break; - - default: - pr_warning("message with invalid subtype %0x04X!\n", - event->xSubtype & VIOMINOR_SUBTYPE_MASK); - if (hvlpevent_need_ack(event)) { - event->xRc = HvLpEvent_Rc_InvalidSubtype; - HvCallEvent_ackLpEvent(event); - } - } -} - -static int viocd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, - void *arg) -{ - return -EINVAL; -} - -static struct cdrom_device_ops viocd_dops = { - .open = viocd_open, - .release = viocd_release, - .check_events = viocd_check_events, - .lock_door = viocd_lock_door, - .generic_packet = viocd_packet, - .audio_ioctl = viocd_audio_ioctl, - .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_DRIVE_STATUS | CDC_GENERIC_PACKET | CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_RAM -}; - -static int 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 request_queue *q; - struct device_node *node = vdev->dev.of_node; - - deviceno = vdev->unit_address; - if (deviceno >= VIOCD_MAX_CD) - return -ENODEV; - if (!node) - return -ENODEV; - - if (deviceno >= viocd_numdev) - viocd_numdev = deviceno + 1; - - d = &viocd_diskinfo[deviceno]; - d->rsrcname = of_get_property(node, "linux,vio_rsrcname", NULL); - d->type = of_get_property(node, "linux,vio_type", NULL); - d->model = of_get_property(node, "linux,vio_model", NULL); - - c = &d->viocd_info; - - c->ops = &viocd_dops; - c->speed = 4; - c->capacity = 1; - c->handle = d; - c->mask = ~find_capability(d->type); - sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); - - if (register_cdrom(c) != 0) { - pr_warning("Cannot register viocd CD-ROM %s!\n", c->name); - goto out; - } - pr_info("cd %s is iSeries resource %10.10s type %4.4s, model %3.3s\n", - c->name, d->rsrcname, d->type, d->model); - q = blk_init_queue(do_viocd_request, &viocd_reqlock); - if (q == NULL) { - pr_warning("Cannot allocate queue for %s!\n", c->name); - goto out_unregister_cdrom; - } - gendisk = alloc_disk(1); - if (gendisk == NULL) { - pr_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)); - blk_queue_max_segments(q, 1); - blk_queue_max_hw_sectors(q, 4096 / 512); - gendisk->queue = q; - gendisk->fops = &viocd_fops; - gendisk->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE | - GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE; - 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]; - - unregister_cdrom(&d->viocd_info); - 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 = { - { "block", "IBM,iSeries-viocd" }, - { "", "" } -}; -MODULE_DEVICE_TABLE(vio, viocd_device_table); - -static struct vio_driver viocd_driver = { - .id_table = viocd_device_table, - .probe = viocd_probe, - .remove = viocd_remove, - .driver = { - .name = "viocd", - .owner = THIS_MODULE, - } -}; - -static int __init viocd_init(void) -{ - int ret = 0; - - if (!firmware_has_feature(FW_FEATURE_ISERIES)) - return -ENODEV; - - if (viopath_hostLp == HvLpIndexInvalid) { - vio_set_hostlp(); - /* If we don't have a host, bail out */ - if (viopath_hostLp == HvLpIndexInvalid) - return -ENODEV; - } - - pr_info("vers " VIOCD_VERS ", hosting partition %d\n", viopath_hostLp); - - if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { - pr_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) { - pr_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); - - spin_lock_init(&viocd_reqlock); - - ret = vio_register_driver(&viocd_driver); - if (ret) - goto out_free_info; - - proc_create("iSeries/viocd", S_IFREG|S_IRUGO, NULL, - &proc_viocd_operations); - return 0; - -out_free_info: - 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); - 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"); diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c deleted file mode 100644 index ad6e64a2912d..000000000000 --- a/drivers/char/viotape.c +++ /dev/null @@ -1,1041 +0,0 @@ -/* -*- linux-c -*- - * drivers/char/viotape.c - * - * iSeries Virtual Tape - * - * 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) 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 tape drives owned and managed by an OS/400 - * partition running on the same box as this Linux partition. - * - * All tape operations are performed by sending messages back and forth to - * the OS/400 partition. The format of the messages is defined in - * iseries/vio.h - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/wait.h> -#include <linux/spinlock.h> -#include <linux/mtio.h> -#include <linux/device.h> -#include <linux/dma-mapping.h> -#include <linux/fs.h> -#include <linux/cdev.h> -#include <linux/major.h> -#include <linux/completion.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/mutex.h> -#include <linux/slab.h> - -#include <asm/uaccess.h> -#include <asm/ioctls.h> -#include <asm/firmware.h> -#include <asm/vio.h> -#include <asm/iseries/vio.h> -#include <asm/iseries/hv_lp_event.h> -#include <asm/iseries/hv_call_event.h> -#include <asm/iseries/hv_lp_config.h> - -#define VIOTAPE_VERSION "1.2" -#define VIOTAPE_MAXREQ 1 - -#define VIOTAPE_KERN_WARN KERN_WARNING "viotape: " -#define VIOTAPE_KERN_INFO KERN_INFO "viotape: " - -static DEFINE_MUTEX(proc_viotape_mutex); -static int viotape_numdev; - -/* - * The minor number follows the conventions of the SCSI tape drives. The - * rewind and mode are encoded in the minor #. We use this struct to break - * them out - */ -struct viot_devinfo_struct { - int devno; - int mode; - int rewind; -}; - -#define VIOTAPOP_RESET 0 -#define VIOTAPOP_FSF 1 -#define VIOTAPOP_BSF 2 -#define VIOTAPOP_FSR 3 -#define VIOTAPOP_BSR 4 -#define VIOTAPOP_WEOF 5 -#define VIOTAPOP_REW 6 -#define VIOTAPOP_NOP 7 -#define VIOTAPOP_EOM 8 -#define VIOTAPOP_ERASE 9 -#define VIOTAPOP_SETBLK 10 -#define VIOTAPOP_SETDENSITY 11 -#define VIOTAPOP_SETPOS 12 -#define VIOTAPOP_GETPOS 13 -#define VIOTAPOP_SETPART 14 -#define VIOTAPOP_UNLOAD 15 - -enum viotaperc { - viotape_InvalidRange = 0x0601, - viotape_InvalidToken = 0x0602, - viotape_DMAError = 0x0603, - viotape_UseError = 0x0604, - viotape_ReleaseError = 0x0605, - viotape_InvalidTape = 0x0606, - viotape_InvalidOp = 0x0607, - viotape_TapeErr = 0x0608, - - viotape_AllocTimedOut = 0x0640, - viotape_BOTEnc = 0x0641, - viotape_BlankTape = 0x0642, - viotape_BufferEmpty = 0x0643, - viotape_CleanCartFound = 0x0644, - viotape_CmdNotAllowed = 0x0645, - viotape_CmdNotSupported = 0x0646, - viotape_DataCheck = 0x0647, - viotape_DecompressErr = 0x0648, - viotape_DeviceTimeout = 0x0649, - viotape_DeviceUnavail = 0x064a, - viotape_DeviceBusy = 0x064b, - viotape_EndOfMedia = 0x064c, - viotape_EndOfTape = 0x064d, - viotape_EquipCheck = 0x064e, - viotape_InsufficientRs = 0x064f, - viotape_InvalidLogBlk = 0x0650, - viotape_LengthError = 0x0651, - viotape_LibDoorOpen = 0x0652, - viotape_LoadFailure = 0x0653, - viotape_NotCapable = 0x0654, - viotape_NotOperational = 0x0655, - viotape_NotReady = 0x0656, - viotape_OpCancelled = 0x0657, - viotape_PhyLinkErr = 0x0658, - viotape_RdyNotBOT = 0x0659, - viotape_TapeMark = 0x065a, - viotape_WriteProt = 0x065b -}; - -static const struct vio_error_entry viotape_err_table[] = { - { viotape_InvalidRange, EIO, "Internal error" }, - { viotape_InvalidToken, EIO, "Internal error" }, - { viotape_DMAError, EIO, "DMA error" }, - { viotape_UseError, EIO, "Internal error" }, - { viotape_ReleaseError, EIO, "Internal error" }, - { viotape_InvalidTape, EIO, "Invalid tape device" }, - { viotape_InvalidOp, EIO, "Invalid operation" }, - { viotape_TapeErr, EIO, "Tape error" }, - { viotape_AllocTimedOut, EBUSY, "Allocate timed out" }, - { viotape_BOTEnc, EIO, "Beginning of tape encountered" }, - { viotape_BlankTape, EIO, "Blank tape" }, - { viotape_BufferEmpty, EIO, "Buffer empty" }, - { viotape_CleanCartFound, ENOMEDIUM, "Cleaning cartridge found" }, - { viotape_CmdNotAllowed, EIO, "Command not allowed" }, - { viotape_CmdNotSupported, EIO, "Command not supported" }, - { viotape_DataCheck, EIO, "Data check" }, - { viotape_DecompressErr, EIO, "Decompression error" }, - { viotape_DeviceTimeout, EBUSY, "Device timeout" }, - { viotape_DeviceUnavail, EIO, "Device unavailable" }, - { viotape_DeviceBusy, EBUSY, "Device busy" }, - { viotape_EndOfMedia, ENOSPC, "End of media" }, - { viotape_EndOfTape, ENOSPC, "End of tape" }, - { viotape_EquipCheck, EIO, "Equipment check" }, - { viotape_InsufficientRs, EOVERFLOW, "Insufficient tape resources" }, - { viotape_InvalidLogBlk, EIO, "Invalid logical block location" }, - { viotape_LengthError, EOVERFLOW, "Length error" }, - { viotape_LibDoorOpen, EBUSY, "Door open" }, - { viotape_LoadFailure, ENOMEDIUM, "Load failure" }, - { viotape_NotCapable, EIO, "Not capable" }, - { viotape_NotOperational, EIO, "Not operational" }, - { viotape_NotReady, EIO, "Not ready" }, - { viotape_OpCancelled, EIO, "Operation cancelled" }, - { viotape_PhyLinkErr, EIO, "Physical link error" }, - { viotape_RdyNotBOT, EIO, "Ready but not beginning of tape" }, - { viotape_TapeMark, EIO, "Tape mark" }, - { viotape_WriteProt, EROFS, "Write protection error" }, - { 0, 0, NULL }, -}; - -/* Maximum number of tapes we support */ -#define VIOTAPE_MAX_TAPE HVMAXARCHITECTEDVIRTUALTAPES -#define MAX_PARTITIONS 4 - -/* defines for current tape state */ -#define VIOT_IDLE 0 -#define VIOT_READING 1 -#define VIOT_WRITING 2 - -/* Our info on the tapes */ -static struct { - const char *rsrcname; - const char *type; - const char *model; -} viotape_unitinfo[VIOTAPE_MAX_TAPE]; - -static struct mtget viomtget[VIOTAPE_MAX_TAPE]; - -static struct class *tape_class; - -static struct device *tape_device[VIOTAPE_MAX_TAPE]; - -/* - * maintain the current state of each tape (and partition) - * so that we know when to write EOF marks. - */ -static struct { - unsigned char cur_part; - unsigned char part_stat_rwi[MAX_PARTITIONS]; -} state[VIOTAPE_MAX_TAPE]; - -/* We single-thread */ -static struct semaphore reqSem; - -/* - * When we send a request, we use this struct to get the response back - * from the interrupt handler - */ -struct op_struct { - void *buffer; - dma_addr_t dmaaddr; - size_t count; - int rc; - int non_blocking; - struct completion com; - struct device *dev; - struct op_struct *next; -}; - -static spinlock_t op_struct_list_lock; -static struct op_struct *op_struct_list; - -/* forward declaration to resolve interdependence */ -static int chg_state(int index, unsigned char new_state, struct file *file); - -/* procfs support */ -static int proc_viotape_show(struct seq_file *m, void *v) -{ - int i; - - seq_printf(m, "viotape driver version " VIOTAPE_VERSION "\n"); - for (i = 0; i < viotape_numdev; i++) { - seq_printf(m, "viotape device %d is iSeries resource %10.10s" - "type %4.4s, model %3.3s\n", - i, viotape_unitinfo[i].rsrcname, - viotape_unitinfo[i].type, - viotape_unitinfo[i].model); - } - return 0; -} - -static int proc_viotape_open(struct inode *inode, struct file *file) -{ - return single_open(file, proc_viotape_show, NULL); -} - -static const struct file_operations proc_viotape_operations = { - .owner = THIS_MODULE, - .open = proc_viotape_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -/* Decode the device minor number into its parts */ -void get_dev_info(struct inode *ino, struct viot_devinfo_struct *devi) -{ - devi->devno = iminor(ino) & 0x1F; - devi->mode = (iminor(ino) & 0x60) >> 5; - /* if bit is set in the minor, do _not_ rewind automatically */ - devi->rewind = (iminor(ino) & 0x80) == 0; -} - -/* This is called only from the exit and init paths, so no need for locking */ -static void clear_op_struct_pool(void) -{ - while (op_struct_list) { - struct op_struct *toFree = op_struct_list; - op_struct_list = op_struct_list->next; - kfree(toFree); - } -} - -/* Likewise, this is only called from the init path */ -static int add_op_structs(int structs) -{ - int i; - - for (i = 0; i < structs; ++i) { - struct op_struct *new_struct = - kmalloc(sizeof(*new_struct), GFP_KERNEL); - if (!new_struct) { - clear_op_struct_pool(); - return -ENOMEM; - } - new_struct->next = op_struct_list; - op_struct_list = new_struct; - } - return 0; -} - -/* Allocate an op structure from our pool */ -static struct op_struct *get_op_struct(void) -{ - struct op_struct *retval; - unsigned long flags; - - spin_lock_irqsave(&op_struct_list_lock, flags); - retval = op_struct_list; - if (retval) - op_struct_list = retval->next; - spin_unlock_irqrestore(&op_struct_list_lock, flags); - if (retval) { - memset(retval, 0, sizeof(*retval)); - init_completion(&retval->com); - } - - return retval; -} - -/* Return an op structure to our pool */ -static void free_op_struct(struct op_struct *op_struct) -{ - unsigned long flags; - - spin_lock_irqsave(&op_struct_list_lock, flags); - op_struct->next = op_struct_list; - op_struct_list = op_struct; - spin_unlock_irqrestore(&op_struct_list_lock, flags); -} - -/* Map our tape return codes to errno values */ -int tape_rc_to_errno(int tape_rc, char *operation, int tapeno) -{ - const struct vio_error_entry *err; - - if (tape_rc == 0) - return 0; - - err = vio_lookup_rc(viotape_err_table, tape_rc); - printk(VIOTAPE_KERN_WARN "error(%s) 0x%04x on Device %d (%-10s): %s\n", - operation, tape_rc, tapeno, - viotape_unitinfo[tapeno].rsrcname, err->msg); - return -err->errno; -} - -/* Write */ -static ssize_t viotap_write(struct file *file, const char *buf, - size_t count, loff_t * ppos) -{ - HvLpEvent_Rc hvrc; - unsigned short flags = file->f_flags; - int noblock = ((flags & O_NONBLOCK) != 0); - ssize_t ret; - struct viot_devinfo_struct devi; - struct op_struct *op = get_op_struct(); - - if (op == NULL) - return -ENOMEM; - - get_dev_info(file->f_path.dentry->d_inode, &devi); - - /* - * We need to make sure we can send a request. We use - * a semaphore to keep track of # requests in use. If - * we are non-blocking, make sure we don't block on the - * semaphore - */ - if (noblock) { - if (down_trylock(&reqSem)) { - ret = -EWOULDBLOCK; - goto free_op; - } - } else - down(&reqSem); - - /* Allocate a DMA buffer */ - op->dev = tape_device[devi.devno]; - op->buffer = dma_alloc_coherent(op->dev, count, &op->dmaaddr, - GFP_ATOMIC); - - if (op->buffer == NULL) { - printk(VIOTAPE_KERN_WARN - "error allocating dma buffer for len %ld\n", - count); - ret = -EFAULT; - goto up_sem; - } - - /* Copy the data into the buffer */ - if (copy_from_user(op->buffer, buf, count)) { - printk(VIOTAPE_KERN_WARN "tape: error on copy from user\n"); - ret = -EFAULT; - goto free_dma; - } - - op->non_blocking = noblock; - init_completion(&op->com); - op->count = count; - - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotapewrite, - HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, VIOVERSION << 16, - ((u64)devi.devno << 48) | op->dmaaddr, count, 0, 0); - if (hvrc != HvLpEvent_Rc_Good) { - printk(VIOTAPE_KERN_WARN "hv error on op %d\n", - (int)hvrc); - ret = -EIO; - goto free_dma; - } - - if (noblock) - return count; - - wait_for_completion(&op->com); - - if (op->rc) - ret = tape_rc_to_errno(op->rc, "write", devi.devno); - else { - chg_state(devi.devno, VIOT_WRITING, file); - ret = op->count; - } - -free_dma: - dma_free_coherent(op->dev, count, op->buffer, op->dmaaddr); -up_sem: - up(&reqSem); -free_op: - free_op_struct(op); - return ret; -} - -/* read */ -static ssize_t viotap_read(struct file *file, char *buf, size_t count, - loff_t *ptr) -{ - HvLpEvent_Rc hvrc; - unsigned short flags = file->f_flags; - struct op_struct *op = get_op_struct(); - int noblock = ((flags & O_NONBLOCK) != 0); - ssize_t ret; - struct viot_devinfo_struct devi; - - if (op == NULL) - return -ENOMEM; - - get_dev_info(file->f_path.dentry->d_inode, &devi); - - /* - * We need to make sure we can send a request. We use - * a semaphore to keep track of # requests in use. If - * we are non-blocking, make sure we don't block on the - * semaphore - */ - if (noblock) { - if (down_trylock(&reqSem)) { - ret = -EWOULDBLOCK; - goto free_op; - } - } else - down(&reqSem); - - chg_state(devi.devno, VIOT_READING, file); - - /* Allocate a DMA buffer */ - op->dev = tape_device[devi.devno]; - op->buffer = dma_alloc_coherent(op->dev, count, &op->dmaaddr, - GFP_ATOMIC); - if (op->buffer == NULL) { - ret = -EFAULT; - goto up_sem; - } - - op->count = count; - init_completion(&op->com); - - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotaperead, - HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, VIOVERSION << 16, - ((u64)devi.devno << 48) | op->dmaaddr, count, 0, 0); - if (hvrc != HvLpEvent_Rc_Good) { - printk(VIOTAPE_KERN_WARN "tape hv error on op %d\n", - (int)hvrc); - ret = -EIO; - goto free_dma; - } - - wait_for_completion(&op->com); - - if (op->rc) - ret = tape_rc_to_errno(op->rc, "read", devi.devno); - else { - ret = op->count; - if (ret && copy_to_user(buf, op->buffer, ret)) { - printk(VIOTAPE_KERN_WARN "error on copy_to_user\n"); - ret = -EFAULT; - } - } - -free_dma: - dma_free_coherent(op->dev, count, op->buffer, op->dmaaddr); -up_sem: - up(&reqSem); -free_op: - free_op_struct(op); - return ret; -} - -/* ioctl */ -static int viotap_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - HvLpEvent_Rc hvrc; - int ret; - struct viot_devinfo_struct devi; - struct mtop mtc; - u32 myOp; - struct op_struct *op = get_op_struct(); - - if (op == NULL) - return -ENOMEM; - - get_dev_info(file->f_path.dentry->d_inode, &devi); - - down(&reqSem); - - ret = -EINVAL; - - switch (cmd) { - case MTIOCTOP: - ret = -EFAULT; - /* - * inode is null if and only if we (the kernel) - * made the request - */ - if (inode == NULL) - memcpy(&mtc, (void *) arg, sizeof(struct mtop)); - else if (copy_from_user((char *)&mtc, (char *)arg, - sizeof(struct mtop))) - goto free_op; - - ret = -EIO; - switch (mtc.mt_op) { - case MTRESET: - myOp = VIOTAPOP_RESET; - break; - case MTFSF: - myOp = VIOTAPOP_FSF; - break; - case MTBSF: - myOp = VIOTAPOP_BSF; - break; - case MTFSR: - myOp = VIOTAPOP_FSR; - break; - case MTBSR: - myOp = VIOTAPOP_BSR; - break; - case MTWEOF: - myOp = VIOTAPOP_WEOF; - break; - case MTREW: - myOp = VIOTAPOP_REW; - break; - case MTNOP: - myOp = VIOTAPOP_NOP; - break; - case MTEOM: - myOp = VIOTAPOP_EOM; - break; - case MTERASE: - myOp = VIOTAPOP_ERASE; - break; - case MTSETBLK: - myOp = VIOTAPOP_SETBLK; - break; - case MTSETDENSITY: - myOp = VIOTAPOP_SETDENSITY; - break; - case MTTELL: - myOp = VIOTAPOP_GETPOS; - break; - case MTSEEK: - myOp = VIOTAPOP_SETPOS; - break; - case MTSETPART: - myOp = VIOTAPOP_SETPART; - break; - case MTOFFL: - myOp = VIOTAPOP_UNLOAD; - break; - default: - printk(VIOTAPE_KERN_WARN "MTIOCTOP called " - "with invalid op 0x%x\n", mtc.mt_op); - goto free_op; - } - - /* - * if we moved the head, we are no longer - * reading or writing - */ - switch (mtc.mt_op) { - case MTFSF: - case MTBSF: - case MTFSR: - case MTBSR: - case MTTELL: - case MTSEEK: - case MTREW: - chg_state(devi.devno, VIOT_IDLE, file); - } - - init_completion(&op->com); - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotapeop, - HvLpEvent_AckInd_DoAck, - HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, - VIOVERSION << 16, - ((u64)devi.devno << 48), 0, - (((u64)myOp) << 32) | mtc.mt_count, 0); - if (hvrc != HvLpEvent_Rc_Good) { - printk(VIOTAPE_KERN_WARN "hv error on op %d\n", - (int)hvrc); - goto free_op; - } - wait_for_completion(&op->com); - ret = tape_rc_to_errno(op->rc, "tape operation", devi.devno); - goto free_op; - - case MTIOCGET: - ret = -EIO; - init_completion(&op->com); - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotapegetstatus, - HvLpEvent_AckInd_DoAck, - HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, VIOVERSION << 16, - ((u64)devi.devno << 48), 0, 0, 0); - if (hvrc != HvLpEvent_Rc_Good) { - printk(VIOTAPE_KERN_WARN "hv error on op %d\n", - (int)hvrc); - goto free_op; - } - wait_for_completion(&op->com); - - /* Operation is complete - grab the error code */ - ret = tape_rc_to_errno(op->rc, "get status", devi.devno); - free_op_struct(op); - up(&reqSem); - - if ((ret == 0) && copy_to_user((void *)arg, - &viomtget[devi.devno], - sizeof(viomtget[0]))) - ret = -EFAULT; - return ret; - case MTIOCPOS: - printk(VIOTAPE_KERN_WARN "Got an (unsupported) MTIOCPOS\n"); - break; - default: - printk(VIOTAPE_KERN_WARN "got an unsupported ioctl 0x%0x\n", - cmd); - break; - } - -free_op: - free_op_struct(op); - up(&reqSem); - return ret; -} - -static long viotap_unlocked_ioctl(struct file *file, - unsigned int cmd, unsigned long arg) -{ - long rc; - - mutex_lock(&proc_viotape_mutex); - rc = viotap_ioctl(file->f_path.dentry->d_inode, file, cmd, arg); - mutex_unlock(&proc_viotape_mutex); - return rc; -} - -static int viotap_open(struct inode *inode, struct file *file) -{ - HvLpEvent_Rc hvrc; - struct viot_devinfo_struct devi; - int ret; - struct op_struct *op = get_op_struct(); - - if (op == NULL) - return -ENOMEM; - - mutex_lock(&proc_viotape_mutex); - get_dev_info(file->f_path.dentry->d_inode, &devi); - - /* Note: We currently only support one mode! */ - if ((devi.devno >= viotape_numdev) || (devi.mode)) { - ret = -ENODEV; - goto free_op; - } - - init_completion(&op->com); - - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotapeopen, - HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, VIOVERSION << 16, - ((u64)devi.devno << 48), 0, 0, 0); - if (hvrc != 0) { - printk(VIOTAPE_KERN_WARN "bad rc on signalLpEvent %d\n", - (int) hvrc); - ret = -EIO; - goto free_op; - } - - wait_for_completion(&op->com); - ret = tape_rc_to_errno(op->rc, "open", devi.devno); - -free_op: - free_op_struct(op); - mutex_unlock(&proc_viotape_mutex); - return ret; -} - - -static int viotap_release(struct inode *inode, struct file *file) -{ - HvLpEvent_Rc hvrc; - struct viot_devinfo_struct devi; - int ret = 0; - struct op_struct *op = get_op_struct(); - - if (op == NULL) - return -ENOMEM; - init_completion(&op->com); - - get_dev_info(file->f_path.dentry->d_inode, &devi); - - if (devi.devno >= viotape_numdev) { - ret = -ENODEV; - goto free_op; - } - - chg_state(devi.devno, VIOT_IDLE, file); - - if (devi.rewind) { - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotapeop, - HvLpEvent_AckInd_DoAck, - HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, VIOVERSION << 16, - ((u64)devi.devno << 48), 0, - ((u64)VIOTAPOP_REW) << 32, 0); - wait_for_completion(&op->com); - - tape_rc_to_errno(op->rc, "rewind", devi.devno); - } - - hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_tape | viotapeclose, - HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(viopath_hostLp), - viopath_targetinst(viopath_hostLp), - (u64)(unsigned long)op, VIOVERSION << 16, - ((u64)devi.devno << 48), 0, 0, 0); - if (hvrc != 0) { - printk(VIOTAPE_KERN_WARN "bad rc on signalLpEvent %d\n", - (int) hvrc); - ret = -EIO; - goto free_op; - } - - wait_for_completion(&op->com); - - if (op->rc) - printk(VIOTAPE_KERN_WARN "close failed\n"); - -free_op: - free_op_struct(op); - return ret; -} - -const struct file_operations viotap_fops = { - .owner = THIS_MODULE, - .read = viotap_read, - .write = viotap_write, - .unlocked_ioctl = viotap_unlocked_ioctl, - .open = viotap_open, - .release = viotap_release, - .llseek = noop_llseek, -}; - -/* Handle interrupt events for tape */ -static void vioHandleTapeEvent(struct HvLpEvent *event) -{ - int tapeminor; - struct op_struct *op; - struct viotapelpevent *tevent = (struct viotapelpevent *)event; - - if (event == NULL) { - /* Notification that a partition went away! */ - if (!viopath_isactive(viopath_hostLp)) { - /* TODO! Clean up */ - } - return; - } - - tapeminor = event->xSubtype & VIOMINOR_SUBTYPE_MASK; - op = (struct op_struct *)event->xCorrelationToken; - switch (tapeminor) { - case viotapeopen: - case viotapeclose: - op->rc = tevent->sub_type_result; - complete(&op->com); - break; - case viotaperead: - op->rc = tevent->sub_type_result; - op->count = tevent->len; - complete(&op->com); - break; - case viotapewrite: - if (op->non_blocking) { - dma_free_coherent(op->dev, op->count, - op->buffer, op->dmaaddr); - free_op_struct(op); - up(&reqSem); - } else { - op->rc = tevent->sub_type_result; - op->count = tevent->len; - complete(&op->com); - } - break; - case viotapeop: - case viotapegetpos: - case viotapesetpos: - case viotapegetstatus: - if (op) { - op->count = tevent->u.op.count; - op->rc = tevent->sub_type_result; - if (!op->non_blocking) - complete(&op->com); - } - break; - default: - printk(VIOTAPE_KERN_WARN "weird ack\n"); - } -} - -static int viotape_probe(struct vio_dev *vdev, const struct vio_device_id *id) -{ - int i = vdev->unit_address; - int j; - struct device_node *node = vdev->dev.of_node; - - if (i >= VIOTAPE_MAX_TAPE) - return -ENODEV; - if (!node) - return -ENODEV; - - if (i >= viotape_numdev) - viotape_numdev = i + 1; - - tape_device[i] = &vdev->dev; - viotape_unitinfo[i].rsrcname = of_get_property(node, - "linux,vio_rsrcname", NULL); - viotape_unitinfo[i].type = of_get_property(node, "linux,vio_type", - NULL); - viotape_unitinfo[i].model = of_get_property(node, "linux,vio_model", - NULL); - - state[i].cur_part = 0; - for (j = 0; j < MAX_PARTITIONS; ++j) - state[i].part_stat_rwi[j] = VIOT_IDLE; - device_create(tape_class, NULL, MKDEV(VIOTAPE_MAJOR, i), NULL, - "iseries!vt%d", i); - device_create(tape_class, NULL, MKDEV(VIOTAPE_MAJOR, i | 0x80), NULL, - "iseries!nvt%d", i); - printk(VIOTAPE_KERN_INFO "tape iseries/vt%d is iSeries " - "resource %10.10s type %4.4s, model %3.3s\n", - i, viotape_unitinfo[i].rsrcname, - viotape_unitinfo[i].type, viotape_unitinfo[i].model); - return 0; -} - -static int viotape_remove(struct vio_dev *vdev) -{ - int i = vdev->unit_address; - - device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i | 0x80)); - device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i)); - return 0; -} - -/** - * viotape_device_table: Used by vio.c to match devices that we - * support. - */ -static struct vio_device_id viotape_device_table[] __devinitdata = { - { "byte", "IBM,iSeries-viotape" }, - { "", "" } -}; -MODULE_DEVICE_TABLE(vio, viotape_device_table); - -static struct vio_driver viotape_driver = { - .id_table = viotape_device_table, - .probe = viotape_probe, - .remove = viotape_remove, - .driver = { - .name = "viotape", - .owner = THIS_MODULE, - } -}; - - -int __init viotap_init(void) -{ - int ret; - - if (!firmware_has_feature(FW_FEATURE_ISERIES)) - return -ENODEV; - - op_struct_list = NULL; - if ((ret = add_op_structs(VIOTAPE_MAXREQ)) < 0) { - printk(VIOTAPE_KERN_WARN "couldn't allocate op structs\n"); - return ret; - } - spin_lock_init(&op_struct_list_lock); - - sema_init(&reqSem, VIOTAPE_MAXREQ); - - if (viopath_hostLp == HvLpIndexInvalid) { - vio_set_hostlp(); - if (viopath_hostLp == HvLpIndexInvalid) { - ret = -ENODEV; - goto clear_op; - } - } - - ret = viopath_open(viopath_hostLp, viomajorsubtype_tape, - VIOTAPE_MAXREQ + 2); - if (ret) { - printk(VIOTAPE_KERN_WARN - "error on viopath_open to hostlp %d\n", ret); - ret = -EIO; - goto clear_op; - } - - printk(VIOTAPE_KERN_INFO "vers " VIOTAPE_VERSION - ", hosting partition %d\n", viopath_hostLp); - - vio_setHandler(viomajorsubtype_tape, vioHandleTapeEvent); - - ret = register_chrdev(VIOTAPE_MAJOR, "viotape", &viotap_fops); - if (ret < 0) { - printk(VIOTAPE_KERN_WARN "Error registering viotape device\n"); - goto clear_handler; - } - - tape_class = class_create(THIS_MODULE, "tape"); - if (IS_ERR(tape_class)) { - printk(VIOTAPE_KERN_WARN "Unable to allocat class\n"); - ret = PTR_ERR(tape_class); - goto unreg_chrdev; - } - - ret = vio_register_driver(&viotape_driver); - if (ret) - goto unreg_class; - - proc_create("iSeries/viotape", S_IFREG|S_IRUGO, NULL, - &proc_viotape_operations); - - return 0; - -unreg_class: - class_destroy(tape_class); -unreg_chrdev: - unregister_chrdev(VIOTAPE_MAJOR, "viotape"); -clear_handler: - vio_clearHandler(viomajorsubtype_tape); - viopath_close(viopath_hostLp, viomajorsubtype_tape, VIOTAPE_MAXREQ + 2); -clear_op: - clear_op_struct_pool(); - return ret; -} - -/* Give a new state to the tape object */ -static int chg_state(int index, unsigned char new_state, struct file *file) -{ - unsigned char *cur_state = - &state[index].part_stat_rwi[state[index].cur_part]; - int rc = 0; - - /* if the same state, don't bother */ - if (*cur_state == new_state) - return 0; - - /* write an EOF if changing from writing to some other state */ - if (*cur_state == VIOT_WRITING) { - struct mtop write_eof = { MTWEOF, 1 }; - - rc = viotap_ioctl(NULL, file, MTIOCTOP, - (unsigned long)&write_eof); - } - *cur_state = new_state; - return rc; -} - -/* Cleanup */ -static void __exit viotap_exit(void) -{ - remove_proc_entry("iSeries/viotape", NULL); - vio_unregister_driver(&viotape_driver); - class_destroy(tape_class); - unregister_chrdev(VIOTAPE_MAJOR, "viotape"); - viopath_close(viopath_hostLp, viomajorsubtype_tape, VIOTAPE_MAXREQ + 2); - vio_clearHandler(viomajorsubtype_tape); - clear_op_struct_pool(); -} - -MODULE_LICENSE("GPL"); -module_init(viotap_init); -module_exit(viotap_exit); |