diff options
author | Mike Miller <mike.miller@hp.com> | 2006-12-06 20:35:12 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:30 -0800 |
commit | 799202cbd0ef6a201446d99fcbd78b9f0bda6ae5 (patch) | |
tree | cfc6a988170f4e65b810ee6a523e6d858ee01ce2 /drivers/block/cciss.c | |
parent | 3833a748aa75dd39494bb861ab018216b0a2c14e (diff) |
[PATCH] cciss: add support for 1024 logical volumes
Add the support for a large number of logical volumes. We will soon have
hardware that support up to 1024 logical volumes.
Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block/cciss.c')
-rw-r--r-- | drivers/block/cciss.c | 114 |
1 files changed, 77 insertions, 37 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 70cf9321ef5..c99cb7ed57f 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -1315,6 +1315,11 @@ static void cciss_update_drive_info(int ctlr, int drv_index) /* if it's the controller it's already added */ if (drv_index) { disk->queue = blk_init_queue(do_cciss_request, &h->lock); + sprintf(disk->disk_name, "cciss/c%dd%d", ctlr, drv_index); + disk->major = h->major; + disk->first_minor = drv_index << NWD_SHIFT; + disk->fops = &cciss_fops; + disk->private_data = &h->drv[drv_index]; /* Set up queue information */ disk->queue->backing_dev_info.ra_pages = READ_AHEAD; @@ -1393,11 +1398,6 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) /* Set busy_configuring flag for this operation */ spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); - if (h->num_luns >= CISS_MAX_LUN) { - spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - return -EINVAL; - } - if (h->busy_configuring) { spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); return -EBUSY; @@ -1430,17 +1430,8 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) 0, 0, TYPE_CMD); if (return_code == IO_OK) { - listlength |= - (0xff & (unsigned int)(ld_buff->LUNListLength[0])) - << 24; - listlength |= - (0xff & (unsigned int)(ld_buff->LUNListLength[1])) - << 16; - listlength |= - (0xff & (unsigned int)(ld_buff->LUNListLength[2])) - << 8; - listlength |= - 0xff & (unsigned int)(ld_buff->LUNListLength[3]); + listlength = + be32_to_cpu(*(__u32 *) ld_buff->LUNListLength); } else { /* reading number of logical volumes failed */ printk(KERN_WARNING "cciss: report logical volume" " command failed\n"); @@ -1491,6 +1482,14 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) if (drv_index == -1) goto freeret; + /*Check if the gendisk needs to be allocated */ + if (!h->gendisk[drv_index]){ + h->gendisk[drv_index] = alloc_disk(1 << NWD_SHIFT); + if (!h->gendisk[drv_index]){ + printk(KERN_ERR "cciss: could not allocate new disk %d\n", drv_index); + goto mem_msg; + } + } } h->drv[drv_index].LunID = lunid; cciss_update_drive_info(ctlr, drv_index); @@ -1528,6 +1527,7 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, int clear_all) { + int i; ctlr_info_t *h = get_host(disk); if (!capable(CAP_SYS_RAWIO)) @@ -1551,9 +1551,35 @@ static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, del_gendisk(disk); if (q) { blk_cleanup_queue(q); + /* Set drv->queue to NULL so that we do not try + * to call blk_start_queue on this queue in the + * interrupt handler + */ drv->queue = NULL; } + /* If clear_all is set then we are deleting the logical + * drive, not just refreshing its info. For drives + * other than disk 0 we will call put_disk. We do not + * do this for disk 0 as we need it to be able to + * configure the controller. + */ + if (clear_all){ + /* This isn't pretty, but we need to find the + * disk in our array and NULL our the pointer. + * This is so that we will call alloc_disk if + * this index is used again later. + */ + for (i=0; i < CISS_MAX_LUN; i++){ + if(h->gendisk[i] == disk){ + h->gendisk[i] = NULL; + break; + } + } + put_disk(disk); + } } + } else { + set_capacity(disk, 0); } --h->num_luns; @@ -3119,13 +3145,7 @@ geo_inq: /* Returns -1 if no free entries are left. */ static int alloc_cciss_hba(void) { - struct gendisk *disk[NWD]; - int i, n; - for (n = 0; n < NWD; n++) { - disk[n] = alloc_disk(1 << NWD_SHIFT); - if (!disk[n]) - goto out; - } + int i; for (i = 0; i < MAX_CTLR; i++) { if (!hba[i]) { @@ -3133,20 +3153,18 @@ static int alloc_cciss_hba(void) p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); if (!p) goto Enomem; - for (n = 0; n < NWD; n++) - p->gendisk[n] = disk[n]; + p->gendisk[0] = alloc_disk(1 << NWD_SHIFT); + if (!p->gendisk[0]) + goto Enomem; hba[i] = p; return i; } } printk(KERN_WARNING "cciss: This driver supports a maximum" " of %d controllers.\n", MAX_CTLR); - goto out; - Enomem: + return -1; +Enomem: printk(KERN_ERR "cciss: out of memory.\n"); - out: - while (n--) - put_disk(disk[n]); return -1; } @@ -3156,7 +3174,7 @@ static void free_hba(int i) int n; hba[i] = NULL; - for (n = 0; n < NWD; n++) + for (n = 0; n < CISS_MAX_LUN; n++) put_disk(p->gendisk[n]); kfree(p); } @@ -3169,9 +3187,8 @@ static void free_hba(int i) static int __devinit cciss_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { - request_queue_t *q; int i; - int j; + int j = 0; int rc; int dac; @@ -3283,16 +3300,29 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, hba[i]->busy_initializing = 0; - for (j = 0; j < NWD; j++) { /* mfm */ + do { drive_info_struct *drv = &(hba[i]->drv[j]); struct gendisk *disk = hba[i]->gendisk[j]; + request_queue_t *q; + + /* Check if the disk was allocated already */ + if (!disk){ + hba[i]->gendisk[j] = alloc_disk(1 << NWD_SHIFT); + disk = hba[i]->gendisk[j]; + } + + /* Check that the disk was able to be allocated */ + if (!disk) { + printk(KERN_ERR "cciss: unable to allocate memory for disk %d\n", j); + goto clean4; + } q = blk_init_queue(do_cciss_request, &hba[i]->lock); if (!q) { printk(KERN_ERR "cciss: unable to allocate queue for disk %d\n", j); - break; + goto clean4; } drv->queue = q; @@ -3324,7 +3354,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, blk_queue_hardsect_size(q, drv->block_size); set_capacity(disk, drv->nr_blocks); add_disk(disk); - } + j++; + } while (j <= hba[i]->highest_lun); return 1; @@ -3347,6 +3378,15 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, unregister_blkdev(hba[i]->major, hba[i]->devname); clean1: hba[i]->busy_initializing = 0; + /* cleanup any queues that may have been initialized */ + for (j=0; j <= hba[i]->highest_lun; j++){ + drive_info_struct *drv = &(hba[i]->drv[j]); + if (drv->queue) + blk_cleanup_queue(drv->queue); + } + pci_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); free_hba(i); return -1; } @@ -3394,7 +3434,7 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev) remove_proc_entry(hba[i]->devname, proc_cciss); /* remove it from the disk list */ - for (j = 0; j < NWD; j++) { + for (j = 0; j < CISS_MAX_LUN; j++) { struct gendisk *disk = hba[i]->gendisk[j]; if (disk) { request_queue_t *q = disk->queue; |