diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/cciss.c | 473 |
1 files changed, 169 insertions, 304 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index f9f10a15d253..08255644e80a 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -159,7 +159,7 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo); static int cciss_revalidate(struct gendisk *disk); -static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk); +static int rebuild_lun_table(ctlr_info_t *h, int first_time); static int deregister_disk(struct gendisk *disk, drive_info_struct *drv, int clear_all); @@ -171,7 +171,6 @@ static void cciss_geometry_inquiry(int ctlr, int logvol, int withirq, sector_t total_size, unsigned int block_size, InquiryData_struct *inq_buff, drive_info_struct *drv); -static void cciss_getgeometry(int cntl_num); static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *, __u32); static void start_io(ctlr_info_t *h); @@ -929,8 +928,10 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, return 0; } + case CCISS_DEREGDISK: + case CCISS_REGNEWD: case CCISS_REVALIDVOLS: - return rebuild_lun_table(host, NULL); + return rebuild_lun_table(host, 0); case CCISS_GETLUNINFO:{ LogvolInfo_struct luninfo; @@ -943,12 +944,6 @@ static int cciss_ioctl(struct inode *inode, struct file *filep, return -EFAULT; return 0; } - case CCISS_DEREGDISK: - return rebuild_lun_table(host, disk); - - case CCISS_REGNEWD: - return rebuild_lun_table(host, NULL); - case CCISS_PASSTHRU: { IOCTL_Command_struct iocommand; @@ -1361,6 +1356,42 @@ static void cciss_get_serial_no(int ctlr, int logvol, int withirq, return; } +static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, + int drv_index) +{ + disk->queue = blk_init_queue(do_cciss_request, &h->lock); + sprintf(disk->disk_name, "cciss/c%dd%d", h->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 */ + blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); + + /* This is a hardware imposed limit. */ + blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); + + /* This is a limit in the driver and could be eliminated. */ + blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); + + blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); + + blk_queue_softirq_done(disk->queue, cciss_softirq_done); + + disk->queue->queuedata = h; + + blk_queue_hardsect_size(disk->queue, + h->drv[drv_index].block_size); + + /* Make sure all queue data is written out before */ + /* setting h->drv[drv_index].queue, as setting this */ + /* allows the interrupt handler to start the queue */ + wmb(); + h->drv[drv_index].queue = disk->queue; + add_disk(disk); +} + /* This function will check the usage_count of the drive to be updated/added. * If the usage_count is zero and it is a heretofore unknown drive, or, * the drive's capacity, geometry, or serial number has changed, @@ -1371,7 +1402,7 @@ static void cciss_get_serial_no(int ctlr, int logvol, int withirq, * is also the controller node. Any changes to disk 0 will show up on * the next reboot. */ -static void cciss_update_drive_info(int ctlr, int drv_index) +static void cciss_update_drive_info(int ctlr, int drv_index, int first_time) { ctlr_info_t *h = hba[ctlr]; struct gendisk *disk; @@ -1381,6 +1412,7 @@ static void cciss_update_drive_info(int ctlr, int drv_index) unsigned long flags = 0; int ret = 0; drive_info_struct *drvinfo; + int was_only_controller_node; /* Get information about the disk and modify the driver structure */ inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); @@ -1388,6 +1420,13 @@ static void cciss_update_drive_info(int ctlr, int drv_index) if (inq_buff == NULL || drvinfo == NULL) goto mem_msg; + /* See if we're trying to update the "controller node" + * this will happen the when the first logical drive gets + * created by ACU. + */ + was_only_controller_node = (drv_index == 0 && + h->drv[0].raid_level == -1); + /* testing to see if 16-byte CDBs are already being used */ if (h->cciss_read == CCISS_READ_16) { cciss_read_capacity_16(h->ctlr, drv_index, 1, @@ -1427,25 +1466,26 @@ static void cciss_update_drive_info(int ctlr, int drv_index) drvinfo->nr_blocks == h->drv[drv_index].nr_blocks && drvinfo->heads == h->drv[drv_index].heads && drvinfo->sectors == h->drv[drv_index].sectors && - drvinfo->cylinders == h->drv[drv_index].cylinders)) { + drvinfo->cylinders == h->drv[drv_index].cylinders)) /* The disk is unchanged, nothing to update */ goto freeret; - } - /* Not the same disk, or something's changed, so we need to */ - /* deregister it, and re-register it, if it's not in use. */ - - /* if the disk already exists then deregister it before proceeding */ - /* (unless it's the first disk (for the controller node). */ + /* If we get here it's not the same disk, or something's changed, + * so we need to * deregister it, and re-register it, if it's not + * in use. + * If the disk already exists then deregister it before proceeding + * (unless it's the first disk (for the controller node). + */ if (h->drv[drv_index].raid_level != -1 && drv_index != 0) { printk(KERN_WARNING "disk %d has changed.\n", drv_index); spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); h->drv[drv_index].busy_configuring = 1; spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - /* deregister_disk sets h->drv[drv_index].queue = NULL */ - /* which keeps the interrupt handler from starting */ - /* the queue. */ + /* deregister_disk sets h->drv[drv_index].queue = NULL + * which keeps the interrupt handler from starting + * the queue. + */ ret = deregister_disk(h->gendisk[drv_index], &h->drv[drv_index], 0); h->drv[drv_index].busy_configuring = 0; @@ -1455,8 +1495,9 @@ static void cciss_update_drive_info(int ctlr, int drv_index) if (ret) goto freeret; - /* Save the new information from cciss_geometry_inquiry */ - /* and serial number inquiry. */ + /* Save the new information from cciss_geometry_inquiry + * and serial number inquiry. + */ h->drv[drv_index].block_size = drvinfo->block_size; h->drv[drv_index].nr_blocks = drvinfo->nr_blocks; h->drv[drv_index].heads = drvinfo->heads; @@ -1469,46 +1510,20 @@ static void cciss_update_drive_info(int ctlr, int drv_index) disk = h->gendisk[drv_index]; set_capacity(disk, h->drv[drv_index].nr_blocks); - /* if it's the controller (if drv_index == 0) 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 */ - blk_queue_bounce_limit(disk->queue, hba[ctlr]->pdev->dma_mask); - - /* This is a hardware imposed limit. */ - blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES); - - /* This is a limit in the driver and could be eliminated. */ - blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES); - - blk_queue_max_sectors(disk->queue, h->cciss_max_sectors); - - blk_queue_softirq_done(disk->queue, cciss_softirq_done); - - disk->queue->queuedata = hba[ctlr]; - - blk_queue_hardsect_size(disk->queue, - hba[ctlr]->drv[drv_index].block_size); - - /* Make sure all queue data is written out before */ - /* setting h->drv[drv_index].queue, as setting this */ - /* allows the interrupt handler to start the queue */ - wmb(); - h->drv[drv_index].queue = disk->queue; - add_disk(disk); - } + /* If it's not disk 0 (drv_index != 0) + * or if it was disk 0, but there was previously + * no actual corresponding configured logical drive + * (raid_leve == -1) then we want to update the + * logical drive's information. + */ + if (drv_index || first_time) + cciss_add_disk(h, disk, drv_index); - freeret: +freeret: kfree(inq_buff); kfree(drvinfo); return; - mem_msg: +mem_msg: printk(KERN_ERR "cciss: out of memory\n"); goto freeret; } @@ -1533,6 +1548,73 @@ static int cciss_find_free_drive_index(int ctlr) return -1; } +/* cciss_add_gendisk finds a free hba[]->drv structure + * and allocates a gendisk if needed, and sets the lunid + * in the drvinfo structure. It returns the index into + * the ->drv[] array, or -1 if none are free. + * is_controller_node indicates whether highest_lun should + * count this disk, or if it's only being added to provide + * a means to talk to the controller in case no logical + * drives have yet been configured. + */ +static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid) +{ + int drv_index; + + drv_index = cciss_find_free_drive_index(h->ctlr); + if (drv_index == -1) + return -1; + /*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%d: could not " + "allocate a new disk %d\n", + h->ctlr, drv_index); + return -1; + } + } + h->drv[drv_index].LunID = lunid; + + /* Don't need to mark this busy because nobody */ + /* else knows about this disk yet to contend */ + /* for access to it. */ + h->drv[drv_index].busy_configuring = 0; + wmb(); + return drv_index; +} + +/* This is for the special case of a controller which + * has no logical drives. In this case, we still need + * to register a disk so the controller can be accessed + * by the Array Config Utility. + */ +static void cciss_add_controller_node(ctlr_info_t *h) +{ + struct gendisk *disk; + int drv_index; + + if (h->gendisk[0] != NULL) /* already did this? Then bail. */ + return; + + drv_index = cciss_add_gendisk(h, 0); + if (drv_index == -1) { + printk(KERN_WARNING "cciss%d: could not " + "add disk 0.\n", h->ctlr); + return; + } + h->drv[drv_index].block_size = 512; + h->drv[drv_index].nr_blocks = 0; + h->drv[drv_index].heads = 0; + h->drv[drv_index].sectors = 0; + h->drv[drv_index].cylinders = 0; + h->drv[drv_index].raid_level = -1; + memset(h->drv[drv_index].serial_no, 0, 16); + disk = h->gendisk[drv_index]; + cciss_add_disk(h, disk, drv_index); +} + /* This function will add and remove logical drives from the Logical * drive array of the controller and maintain persistency of ordering * so that mount points are preserved until the next reboot. This allows @@ -1540,10 +1622,8 @@ static int cciss_find_free_drive_index(int ctlr) * without a re-ordering of those drives. * INPUT * h = The controller to perform the operations on - * del_disk = The disk to remove if specified. If the value given - * is NULL then no disk is removed. */ -static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) +static int rebuild_lun_table(ctlr_info_t *h, int first_time) { int ctlr = h->ctlr; int num_luns; @@ -1556,6 +1636,9 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) __u32 lunid = 0; unsigned long flags; + if (!capable(CAP_SYS_RAWIO)) + return -EPERM; + /* Set busy_configuring flag for this operation */ spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); if (h->busy_configuring) { @@ -1565,9 +1648,6 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) h->busy_configuring = 1; spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); - if (!capable(CAP_SYS_RAWIO)) - return -EPERM; - ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); if (ld_buff == NULL) goto mem_msg; @@ -1593,10 +1673,14 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) " this driver.\n"); } - /* Compare controller drive array to driver's drive array */ - /* to see if any drives are missing on the controller due */ - /* to action of Array Config Utility (user deletes drive) */ - /* and deregister logical drives which have disappeared. */ + if (num_luns == 0) + cciss_add_controller_node(h); + + /* Compare controller drive array to driver's drive array + * to see if any drives are missing on the controller due + * to action of Array Config Utility (user deletes drive) + * and deregister logical drives which have disappeared. + */ for (i = 0; i <= h->highest_lun; i++) { int j; drv_found = 0; @@ -1648,34 +1732,14 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) /* check if the drive was found already in the array */ if (!drv_found) { - drv_index = cciss_find_free_drive_index(ctlr); + drv_index = cciss_add_gendisk(h, lunid); 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; - - /* Don't need to mark this busy because nobody - * else knows about this disk yet to contend - * for access to it. - */ - h->drv[drv_index].busy_configuring = 0; - wmb(); - } - cciss_update_drive_info(ctlr, drv_index); + cciss_update_drive_info(ctlr, drv_index, first_time); } /* end for */ - freeret: +freeret: kfree(ld_buff); h->busy_configuring = 0; /* We return -1 here to tell the ACU that we have registered/updated @@ -1683,7 +1747,7 @@ static int rebuild_lun_table(ctlr_info_t *h, struct gendisk *del_disk) * additional times. */ return -1; - mem_msg: +mem_msg: printk(KERN_ERR "cciss: out of memory\n"); h->busy_configuring = 0; goto freeret; @@ -3288,139 +3352,9 @@ err_out_free_res: return err; } -/* - * Gets information about the local volumes attached to the controller. +/* Function to find the first free pointer into our hba[] array + * Returns -1 if no free entries are left. */ -static void cciss_getgeometry(int cntl_num) -{ - ReportLunData_struct *ld_buff; - InquiryData_struct *inq_buff; - int return_code; - int i; - int listlength = 0; - __u32 lunid = 0; - unsigned block_size; - sector_t total_size; - - ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); - if (ld_buff == NULL) { - printk(KERN_ERR "cciss: out of memory\n"); - return; - } - inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); - if (inq_buff == NULL) { - printk(KERN_ERR "cciss: out of memory\n"); - kfree(ld_buff); - return; - } - /* Get the firmware version */ - return_code = sendcmd(CISS_INQUIRY, cntl_num, inq_buff, - sizeof(InquiryData_struct), 0, 0, 0, NULL, - TYPE_CMD); - if (return_code == IO_OK) { - hba[cntl_num]->firm_ver[0] = inq_buff->data_byte[32]; - hba[cntl_num]->firm_ver[1] = inq_buff->data_byte[33]; - hba[cntl_num]->firm_ver[2] = inq_buff->data_byte[34]; - hba[cntl_num]->firm_ver[3] = inq_buff->data_byte[35]; - } else { /* send command failed */ - - printk(KERN_WARNING "cciss: unable to determine firmware" - " version of controller\n"); - } - /* Get the number of logical volumes */ - return_code = sendcmd(CISS_REPORT_LOG, cntl_num, ld_buff, - sizeof(ReportLunData_struct), 0, 0, 0, NULL, - TYPE_CMD); - - if (return_code == IO_OK) { -#ifdef CCISS_DEBUG - printk("LUN Data\n--------------------------\n"); -#endif /* CCISS_DEBUG */ - - 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]); - } else { /* reading number of logical volumes failed */ - - printk(KERN_WARNING "cciss: report logical volume" - " command failed\n"); - listlength = 0; - } - hba[cntl_num]->num_luns = listlength / 8; // 8 bytes pre entry - if (hba[cntl_num]->num_luns > CISS_MAX_LUN) { - printk(KERN_ERR - "ciss: only %d number of logical volumes supported\n", - CISS_MAX_LUN); - hba[cntl_num]->num_luns = CISS_MAX_LUN; - } -#ifdef CCISS_DEBUG - printk(KERN_DEBUG "Length = %x %x %x %x = %d\n", - ld_buff->LUNListLength[0], ld_buff->LUNListLength[1], - ld_buff->LUNListLength[2], ld_buff->LUNListLength[3], - hba[cntl_num]->num_luns); -#endif /* CCISS_DEBUG */ - - hba[cntl_num]->highest_lun = hba[cntl_num]->num_luns - 1; - for (i = 0; i < CISS_MAX_LUN; i++) { - if (i < hba[cntl_num]->num_luns) { - lunid = (0xff & (unsigned int)(ld_buff->LUN[i][3])) - << 24; - lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][2])) - << 16; - lunid |= (0xff & (unsigned int)(ld_buff->LUN[i][1])) - << 8; - lunid |= 0xff & (unsigned int)(ld_buff->LUN[i][0]); - - hba[cntl_num]->drv[i].LunID = lunid; - -#ifdef CCISS_DEBUG - printk(KERN_DEBUG "LUN[%d]: %x %x %x %x = %x\n", i, - ld_buff->LUN[i][0], ld_buff->LUN[i][1], - ld_buff->LUN[i][2], ld_buff->LUN[i][3], - hba[cntl_num]->drv[i].LunID); -#endif /* CCISS_DEBUG */ - - /* testing to see if 16-byte CDBs are already being used */ - if(hba[cntl_num]->cciss_read == CCISS_READ_16) { - cciss_read_capacity_16(cntl_num, i, 0, - &total_size, &block_size); - goto geo_inq; - } - cciss_read_capacity(cntl_num, i, 0, &total_size, &block_size); - - /* If read_capacity returns all F's the logical is >2TB */ - /* so we switch to 16-byte CDBs for all read/write ops */ - if(total_size == 0xFFFFFFFFULL) { - cciss_read_capacity_16(cntl_num, i, 0, - &total_size, &block_size); - hba[cntl_num]->cciss_read = CCISS_READ_16; - hba[cntl_num]->cciss_write = CCISS_WRITE_16; - } else { - hba[cntl_num]->cciss_read = CCISS_READ_10; - hba[cntl_num]->cciss_write = CCISS_WRITE_10; - } -geo_inq: - cciss_geometry_inquiry(cntl_num, i, 0, total_size, - block_size, inq_buff, - &hba[cntl_num]->drv[i]); - cciss_get_serial_no(cntl_num, i, 0, - hba[cntl_num]->drv[i].serial_no, - sizeof(hba[cntl_num]->drv[i].serial_no)); - } else { - /* initialize raid_level to indicate a free space */ - hba[cntl_num]->drv[i].raid_level = -1; - } - } - kfree(ld_buff); - kfree(inq_buff); -} - -/* Function to find the first free pointer into our hba[] array */ -/* Returns -1 if no free entries are left. */ static int alloc_cciss_hba(void) { int i; @@ -3432,11 +3366,6 @@ static int alloc_cciss_hba(void) p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); if (!p) goto Enomem; - p->gendisk[0] = alloc_disk(1 << NWD_SHIFT); - if (!p->gendisk[0]) { - kfree(p); - goto Enomem; - } hba[i] = p; return i; } @@ -3564,11 +3493,13 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, ((hba[i]->nr_cmds + BITS_PER_LONG - 1) / BITS_PER_LONG) * sizeof(unsigned long)); -#ifdef CCISS_DEBUG - printk(KERN_DEBUG "Scanning for drives on controller cciss%d\n", i); -#endif /* CCISS_DEBUG */ - - cciss_getgeometry(i); + hba[i]->num_luns = 0; + hba[i]->highest_lun = -1; + for (j = 0; j < CISS_MAX_LUN; j++) { + hba[i]->drv[j].raid_level = -1; + hba[i]->drv[j].queue = NULL; + hba[i]->gendisk[j] = NULL; + } cciss_scsi_setup(i); @@ -3581,76 +3512,10 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, hba[i]->busy_initializing = 0; - do { - drive_info_struct *drv = &(hba[i]->drv[j]); - struct gendisk *disk = hba[i]->gendisk[j]; - struct request_queue *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); - goto clean4; - } - drv->queue = q; - - blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask); - - /* This is a hardware imposed limit. */ - blk_queue_max_hw_segments(q, MAXSGENTRIES); - - /* This is a limit in the driver and could be eliminated. */ - blk_queue_max_phys_segments(q, MAXSGENTRIES); - - blk_queue_max_sectors(q, hba[i]->cciss_max_sectors); - - blk_queue_softirq_done(q, cciss_softirq_done); - - q->queuedata = hba[i]; - sprintf(disk->disk_name, "cciss/c%dd%d", i, j); - disk->major = hba[i]->major; - disk->first_minor = j << NWD_SHIFT; - disk->fops = &cciss_fops; - disk->queue = q; - disk->private_data = drv; - disk->driverfs_dev = &pdev->dev; - /* we must register the controller even if no disks exist */ - /* this is for the online array utilities */ - if (!drv->heads && j) - continue; - blk_queue_hardsect_size(q, drv->block_size); - set_capacity(disk, drv->nr_blocks); - j++; - } while (j <= hba[i]->highest_lun); - - /* Make sure all queue data is written out before */ - /* interrupt handler, triggered by add_disk, */ - /* is allowed to start them. */ - wmb(); - - for (j = 0; j <= hba[i]->highest_lun; j++) - add_disk(hba[i]->gendisk[j]); - - /* we must register the controller even if no disks exist */ - if (hba[i]->highest_lun == -1) - add_disk(hba[i]->gendisk[0]); - + rebuild_lun_table(hba[i], 1); return 1; - clean4: +clean4: #ifdef CONFIG_CISS_SCSI_TAPE kfree(hba[i]->scsi_rejects.complete); #endif @@ -3665,9 +3530,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle); free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]); - clean2: +clean2: unregister_blkdev(hba[i]->major, hba[i]->devname); - clean1: +clean1: hba[i]->busy_initializing = 0; /* cleanup any queues that may have been initialized */ for (j=0; j <= hba[i]->highest_lun; j++){ |