/* * Disk Array driver for HP Smart Array controllers. * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P. * * 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; version 2 of the License. * * 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. * * Questions/Comments/Bugfixes to iss_storagedev@hp.com * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin)) #define DRIVER_NAME "HP CISS Driver (v 3.6.26)" #define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26) /* Embedded module documentation macros - see modules.h */ MODULE_AUTHOR("Hewlett-Packard Company"); MODULE_DESCRIPTION("Driver for HP Smart Array Controllers"); MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers"); MODULE_VERSION("3.6.26"); MODULE_LICENSE("GPL"); static int cciss_tape_cmds = 6; module_param(cciss_tape_cmds, int, 0644); MODULE_PARM_DESC(cciss_tape_cmds, "number of commands to allocate for tape devices (default: 6)"); static int cciss_simple_mode; module_param(cciss_simple_mode, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(cciss_simple_mode, "Use 'simple mode' rather than 'performant mode'"); static int cciss_allow_hpsa; module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(cciss_allow_hpsa, "Prevent cciss driver from accessing hardware known to be " " supported by the hpsa driver"); static DEFINE_MUTEX(cciss_mutex); static struct proc_dir_entry *proc_cciss; #include "cciss_cmd.h" #include "cciss.h" #include /* define the PCI info for the cards we can control */ static const struct pci_device_id cciss_pci_device_id[] = { {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C}, {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D}, {0,} }; MODULE_DEVICE_TABLE(pci, cciss_pci_device_id); /* board_id = Subsystem Device ID & Vendor ID * product = Marketing Name for the board * access = Address of the struct of function pointers */ static struct board_type products[] = { {0x40700E11, "Smart Array 5300", &SA5_access}, {0x40800E11, "Smart Array 5i", &SA5B_access}, {0x40820E11, "Smart Array 532", &SA5B_access}, {0x40830E11, "Smart Array 5312", &SA5B_access}, {0x409A0E11, "Smart Array 641", &SA5_access}, {0x409B0E11, "Smart Array 642", &SA5_access}, {0x409C0E11, "Smart Array 6400", &SA5_access}, {0x409D0E11, "Smart Array 6400 EM", &SA5_access}, {0x40910E11, "Smart Array 6i", &SA5_access}, {0x3225103C, "Smart Array P600", &SA5_access}, {0x3223103C, "Smart Array P800", &SA5_access}, {0x3234103C, "Smart Array P400", &SA5_access}, {0x3235103C, "Smart Array P400i", &SA5_access}, {0x3211103C, "Smart Array E200i", &SA5_access}, {0x3212103C, "Smart Array E200", &SA5_access}, {0x3213103C, "Smart Array E200i", &SA5_access}, {0x3214103C, "Smart Array E200i", &SA5_access}, {0x3215103C, "Smart Array E200i", &SA5_access}, {0x3237103C, "Smart Array E500", &SA5_access}, {0x3223103C, "Smart Array P800", &SA5_access}, {0x3234103C, "Smart Array P400", &SA5_access}, {0x323D103C, "Smart Array P700m", &SA5_access}, }; /* How long to wait (in milliseconds) for board to go into simple mode */ #define MAX_CONFIG_WAIT 30000 #define MAX_IOCTL_CONFIG_WAIT 1000 /*define how many times we will try a command because of bus resets */ #define MAX_CMD_RETRIES 3 #define MAX_CTLR 32 /* Originally cciss driver only supports 8 major numbers */ #define MAX_CTLR_ORIG 8 static ctlr_info_t *hba[MAX_CTLR]; static struct task_struct *cciss_scan_thread; static DEFINE_MUTEX(scan_mutex); static LIST_HEAD(scan_q); static void do_cciss_request(struct request_queue *q); static irqreturn_t do_cciss_intx(int irq, void *dev_id); static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id); static int cciss_open(struct block_device *bdev, fmode_t mode); static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode); static void cciss_release(struct gendisk *disk, fmode_t mode); static int cciss_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg); 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, int first_time, int via_ioctl); static int deregister_disk(ctlr_info_t *h, int drv_index, int clear_all, int via_ioctl); static void cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size, unsigned int *block_size); static void cciss_read_capacity_16(ctlr_info_t *h, int logvol, sector_t *total_size, unsigned int *block_size); static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol, sector_t total_size, unsigned int block_size, InquiryData_struct *inq_buff, drive_info_struct *drv); static void cciss_interrupt_mode(ctlr_info_t *); static int cciss_enter_simple_mode(struct ctlr_info *h); static void start_io(ctlr_info_t *h); static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size, __u8 page_code, unsigned char scsi3addr[], int cmd_type); static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, int attempt_retry); static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c); static int add_to_scan_list(struct ctlr_info *h); static int scan_thread(void *data); static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c); static void cciss_hba_release(struct device *dev); static void cciss_device_release(struct device *dev); static void cciss_free_gendisk(ctlr_info_t *h, int drv_index); static void cciss_free_drive_info(ctlr_info_t *h, int drv_index); static inline u32 next_command(ctlr_info_t *h); static int cciss_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index, u64 *cfg_offset); static int cciss_pci_find_memory_BAR(struct pci_dev *pdev, unsigned long *memory_bar); static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag); static int write_driver_ver_to_cfgtable(CfgTable_struct __iomem *cfgtable); /* performant mode helper functions */ static void calc_bucket_map(int *bucket, int num_buckets, int nsgs, int *bucket_map); static void cciss_put_controller_into_performant_mode(ctlr_info_t *h); #ifdef CONFIG_PROC_FS static void cciss_procinit(ctlr_info_t *h); #else static void cciss_procinit(ctlr_info_t *h) { } #endif /* CONFIG_PROC_FS */ #ifdef CONFIG_COMPAT static int cciss_compat_ioctl(struct block_device *, fmode_t, unsigned, unsigned long); #endif static const struct block_device_operations cciss_fops = { .owner = THIS_MODULE, .open = cciss_unlocked_open, .release = cciss_release, .ioctl = cciss_ioctl, .getgeo = cciss_getgeo, #ifdef CONFIG_COMPAT .compat_ioctl = cciss_compat_ioctl, #endif .revalidate_disk = cciss_revalidate, }; /* set_performant_mode: Modify the tag for cciss performant * set bit 0 for pull model, bits 3-1 for block fetch * register number */ static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c) { if (likely(h->transMethod & CFGTBL_Trans_Performant)) c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1); } /* * Enqueuing and dequeuing functions for cmdlists. */ static inline void addQ(struct list_head *list, CommandList_struct *c) { list_add_tail(&c->list, list); } static inline void removeQ(CommandList_struct *c) { /* * After kexec/dump some commands might still * be in flight, which the firmware will try * to complete. Resetting the firmware doesn't work * with old fw revisions, so we have to mark * them off as 'stale' to prevent the driver from * falling over. */ if (WARN_ON(list_empty(&c->list))) { c->cmd_type = CMD_MSG_STALE; return; } list_del_init(&c->list); } static void enqueue_cmd_and_start_io(ctlr_info_t *h, CommandList_struct *c) { unsigned long flags; set_performant_mode(h, c); spin_lock_irqsave(&h->lock, flags); addQ(&h->reqQ, c); h->Qdepth++; if (h->Qdepth > h->maxQsinceinit) h->maxQsinceinit = h->Qdepth; start_io(h); spin_unlock_irqrestore(&h->lock, flags); } static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list, int nr_cmds) { int i; if (!cmd_sg_list) return; for (i = 0; i < nr_cmds; i++) { kfree(cmd_sg_list[i]); cmd_sg_list[i] = NULL; } kfree(cmd_sg_list); } static SGDescriptor_struct **cciss_allocate_sg_chain_blocks( ctlr_info_t *h, int chainsize, int nr_cmds) { int j; SGDescriptor_struct **cmd_sg_list; if (chainsize <= 0) return NULL; cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL); if (!cmd_sg_list) return NULL; /* Build up chain blocks for each command */ for (j = 0; j < nr_cmds; j++) { /* Need a block of chainsized s/g elements. */ cmd_sg_list[j] = kmalloc((chainsize * sizeof(*cmd_sg_list[j])), GFP_KERNEL); if (!cmd_sg_list[j]) { dev_err(&h->pdev->dev, "Cannot get memory " "for s/g chains.\n"); goto clean; } } return cmd_sg_list; clean: cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds); return NULL; } static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c) { SGDescriptor_struct *chain_sg; u64bit temp64; if (c->Header.SGTotal <= h->max_cmd_sgentries) return; chain_sg = &c->SG[h->max_cmd_sgentries - 1]; temp64.val32.lower = chain_sg->Addr.lower; temp64.val32.upper = chain_sg->Addr.upper; pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE); } static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c, SGDescriptor_struct *chain_block, int len) { SGDescriptor_struct *chain_sg; u64bit temp64; chain_sg = &c->SG[h->max_cmd_sgentries - 1]; chain_sg->Ext = CCISS_SG_CHAIN; chain_sg->Len = len; temp64.val = pci_map_single(h->pdev, chain_block, len, PCI_DMA_TODEVICE); chain_sg->Addr.lower = temp64.val32.lower; chain_sg->Addr.upper = temp64.val32.upper; } #include "cciss_scsi.c" /* For SCSI tape support */ static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", "UNKNOWN" }; #define RAID_UNKNOWN (ARRAY_SIZE(raid_label)-1) #ifdef CONFIG_PROC_FS /* * Report information about this controller. */ #define ENG_GIG 1000000000 #define ENG_GIG_FACTOR (ENG_GIG/512) #define ENGAGE_SCSI "engage scsi" static void cciss_seq_show_header(struct seq_file *seq) { ctlr_info_t *h = seq->private; seq_printf(seq, "%s: HP %s Controller\n" "Board ID: 0x%08lx\n" "Firmware Version: %c%c%c%c\n" "IRQ: %d\n" "Logical drives: %d\n" "Current Q depth: %d\n" "Current # commands on controller: %d\n" "Max Q depth since init: %d\n" "Max # commands on controller since init: %d\n" "Max SG entries since init: %d\n", h->devname, h->product_name, (unsigned long)h->board_id, h->firm_ver[0], h->firm_ver[1], h->firm_ver[2], h->firm_ver[3], (unsigned int)h->intr[h->intr_mode], h->num_luns, h->Qdepth, h->commands_outstanding, h->maxQsinceinit, h->max_outstanding, h->maxSG); #ifdef CONFIG_CISS_SCSI_TAPE cciss_seq_tape_report(seq, h); #endif /* CONFIG_CISS_SCSI_TAPE */ } static void *cciss_seq_start(struct seq_file *seq, loff_t *pos) { ctlr_info_t *h = seq->private; unsigned long flags; /* prevent displaying bogus info during configuration * or deconfiguration of a logical volume */ spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) { spin_unlock_irqrestore(&h->lock, flags); return ERR_PTR(-EBUSY); } h->busy_configuring = 1; spin_unlock_irqrestore(&h->lock, flags); if (*pos == 0) cciss_seq_show_header(seq); return pos; } static int cciss_seq_show(struct seq_file *seq, void *v) { sector_t vol_sz, vol_sz_frac; ctlr_info_t *h = seq->private; unsigned ctlr = h->ctlr; loff_t *pos = v; drive_info_struct *drv = h->drv[*pos]; if (*pos > h->highest_lun) return 0; if (drv == NULL) /* it's possible for h->drv[] to have holes. */ return 0; if (drv->heads == 0) return 0; vol_sz = drv->nr_blocks; vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR); vol_sz_frac *= 100; sector_div(vol_sz_frac, ENG_GIG_FACTOR); if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN) drv->raid_level = RAID_UNKNOWN; seq_printf(seq, "cciss/c%dd%d:" "\t%4u.%02uGB\tRAID %s\n", ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac, raid_label[drv->raid_level]); return 0; } static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos) { ctlr_info_t *h = seq->private; if (*pos > h->highest_lun) return NULL; *pos += 1; return pos; } static void cciss_seq_stop(struct seq_file *seq, void *v) { ctlr_info_t *h = seq->private; /* Only reset h->busy_configuring if we succeeded in setting * it during cciss_seq_start. */ if (v == ERR_PTR(-EBUSY)) return; h->busy_configuring = 0; } static const struct seq_operations cciss_seq_ops = { .start = cciss_seq_start, .show = cciss_seq_show, .next = cciss_seq_next, .stop = cciss_seq_stop, }; static int cciss_seq_open(struct inode *inode, struct file *file) { int ret = seq_open(file, &cciss_seq_ops); struct seq_file *seq = file->private_data; if (!ret) seq->private = PDE_DATA(inode); return ret; } static ssize_t cciss_proc_write(struct file *file, const char __user *buf, size_t length, loff_t *ppos) { int err; char *buffer; #ifndef CONFIG_CISS_SCSI_TAPE return -EINVAL; #endif if (!buf || length > PAGE_SIZE - 1) return -EINVAL; buffer = (char *)__get_free_page(GFP_KERNEL); if (!buffer) return -ENOMEM; err = -EFAULT; if (copy_from_user(buffer, buf, length)) goto out; buffer[length] = '\0'; #ifdef CONFIG_CISS_SCSI_TAPE if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) { struct seq_file *seq = file->private_data; ctlr_info_t *h = seq->private; err = cciss_engage_scsi(h); if (err == 0) err = length; } else #endif /* CONFIG_CISS_SCSI_TAPE */ err = -EINVAL; /* might be nice to have "disengage" too, but it's not safely possible. (only 1 module use count, lock issues.) */ out: free_page((unsigned long)buffer); return err; } static const struct file_operations cciss_proc_fops = { .owner = THIS_MODULE, .open = cciss_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, .write = cciss_proc_write, }; static void cciss_procinit(ctlr_info_t *h) { struct proc_dir_entry *pde; if (proc_cciss == NULL) proc_cciss = proc_mkdir("driver/cciss", NULL); if (!proc_cciss) return; pde = proc_create_data(h->devname, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH, proc_cciss, &cciss_proc_fops, h); } #endif /* CONFIG_PROC_FS */ #define MAX_PRODUCT_NAME_LEN 19 #define to_hba(n) container_of(n, struct ctlr_info, dev) #define to_drv(n) container_of(n, drive_info_struct, dev) /* List of controllers which cannot be hard reset on kexec with reset_devices */ static u32 unresettable_controller[] = { 0x324a103C, /* Smart Array P712m */ 0x324b103C, /* SmartArray P711m */ 0x3223103C, /* Smart Array P800 */ 0x3234103C, /* Smart Array P400 */ 0x3235103C, /* Smart Array P400i */ 0x3211103C, /* Smart Array E200i */ 0x3212103C, /* Smart Array E200 */ 0x3213103C, /* Smart Array E200i */ 0x3214103C, /* Smart Array E200i */ 0x3215103C, /* Smart Array E200i */ 0x3237103C, /* Smart Array E500 */ 0x323D103C, /* Smart Array P700m */ 0x409C0E11, /* Smart Array 6400 */ 0x409D0E11, /* Smart Array 6400 EM */ }; /* List of controllers which cannot even be soft reset */ static u32 soft_unresettable_controller[] = { 0x409C0E11, /* Smart Array 6400 */ 0x409D0E11, /* Smart Array 6400 EM */ }; static int ctlr_is_hard_resettable(u32 board_id) { int i; for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++) if (unresettable_controller[i] == board_id) return 0; return 1; } static int ctlr_is_soft_resettable(u32 board_id) { int i; for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++) if (soft_unresettable_controller[i] == board_id) return 0; return 1; } static int ctlr_is_resettable(u32 board_id) { return ctlr_is_hard_resettable(board_id) || ctlr_is_soft_resettable(board_id); } static ssize_t host_show_resettable(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h = to_hba(dev); return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id)); } static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL); static ssize_t host_store_rescan(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ctlr_info *h = to_hba(dev); add_to_scan_list(h); wake_up_process(cciss_scan_thread); wait_for_completion_interruptible(&h->scan_wait); return count; } static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); static ssize_t host_show_transport_mode(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h = to_hba(dev); return snprintf(buf, 20, "%s\n", h->transMethod & CFGTBL_Trans_Performant ? "performant" : "simple"); } static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL); static ssize_t dev_show_unique_id(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); __u8 sn[16]; unsigned long flags; int ret = 0; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) ret = -EBUSY; else memcpy(sn, drv->serial_no, sizeof(sn)); spin_unlock_irqrestore(&h->lock, flags); if (ret) return ret; else return snprintf(buf, 16 * 2 + 2, "%02X%02X%02X%02X%02X%02X%02X%02X" "%02X%02X%02X%02X%02X%02X%02X%02X\n", sn[0], sn[1], sn[2], sn[3], sn[4], sn[5], sn[6], sn[7], sn[8], sn[9], sn[10], sn[11], sn[12], sn[13], sn[14], sn[15]); } static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL); static ssize_t dev_show_vendor(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); char vendor[VENDOR_LEN + 1]; unsigned long flags; int ret = 0; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) ret = -EBUSY; else memcpy(vendor, drv->vendor, VENDOR_LEN + 1); spin_unlock_irqrestore(&h->lock, flags); if (ret) return ret; else return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor); } static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL); static ssize_t dev_show_model(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); char model[MODEL_LEN + 1]; unsigned long flags; int ret = 0; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) ret = -EBUSY; else memcpy(model, drv->model, MODEL_LEN + 1); spin_unlock_irqrestore(&h->lock, flags); if (ret) return ret; else return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model); } static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL); static ssize_t dev_show_rev(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); char rev[REV_LEN + 1]; unsigned long flags; int ret = 0; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) ret = -EBUSY; else memcpy(rev, drv->rev, REV_LEN + 1); spin_unlock_irqrestore(&h->lock, flags); if (ret) return ret; else return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev); } static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); static ssize_t cciss_show_lunid(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); unsigned long flags; unsigned char lunid[8]; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) { spin_unlock_irqrestore(&h->lock, flags); return -EBUSY; } if (!drv->heads) { spin_unlock_irqrestore(&h->lock, flags); return -ENOTTY; } memcpy(lunid, drv->LunID, sizeof(lunid)); spin_unlock_irqrestore(&h->lock, flags); return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", lunid[0], lunid[1], lunid[2], lunid[3], lunid[4], lunid[5], lunid[6], lunid[7]); } static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); static ssize_t cciss_show_raid_level(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); int raid; unsigned long flags; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) { spin_unlock_irqrestore(&h->lock, flags); return -EBUSY; } raid = drv->raid_level; spin_unlock_irqrestore(&h->lock, flags); if (raid < 0 || raid > RAID_UNKNOWN) raid = RAID_UNKNOWN; return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n", raid_label[raid]); } static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); static ssize_t cciss_show_usage_count(struct device *dev, struct device_attribute *attr, char *buf) { drive_info_struct *drv = to_drv(dev); struct ctlr_info *h = to_hba(drv->dev.parent); unsigned long flags; int count; spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) { spin_unlock_irqrestore(&h->lock, flags); return -EBUSY; } count = drv->usage_count; spin_unlock_irqrestore(&h->lock, flags); return snprintf(buf, 20, "%d\n", count); } static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); static struct attribute *cciss_host_attrs[] = { &dev_attr_rescan.attr, &dev_attr_resettable.attr, &dev_attr_transport_mode.attr, NULL }; static struct attribute_group cciss_host_attr_group = { .attrs = cciss_host_attrs, }; static const struct attribute_group *cciss_host_attr_groups[] = { &cciss_host_attr_group, NULL }; static struct device_type cciss_host_type = { .name = "cciss_host", .groups = cciss_host_attr_groups, .release = cciss_hba_release, }; static struct attribute *cciss_dev_attrs[] = { &dev_attr_unique_id.attr, &dev_attr_model.attr, &dev_attr_vendor.attr, &dev_attr_rev.attr, &dev_attr_lunid.attr, &dev_attr_raid_level.attr, &dev_attr_usage_count.attr, NULL }; static struct attribute_group cciss_dev_attr_group = { .attrs = cciss_dev_attrs, }; static const struct attribute_group *cciss_dev_attr_groups[] = { &cciss_dev_attr_group, NULL }; static struct device_type cciss_dev_type = { .name = "cciss_device", .groups = cciss_dev_attr_groups, .release = cciss_device_release, }; static struct bus_type cciss_bus_type = { .name = "cciss", }; /* * cciss_hba_release is called when the reference count * of h->dev goes to zero. */ static void cciss_hba_release(struct device *dev) { /* * nothing to do, but need this to avoid a warning * about not having a release handler from lib/kref.c. */ } /* * Initialize sysfs entry for each controller. This sets up and registers * the 'cciss#' directory for each individual controller under * /sys/bus/pci/devices//. */ static int cciss_create_hba_sysfs_entry(struct ctlr_info *h) { device_initialize(&h->dev); h->dev.type = &cciss_host_type; h->dev.bus = &cciss_bus_type; dev_set_name(&h->dev, "%s", h->devname); h->dev.parent = &h->pdev->dev; return device_add(&h->dev); } /* * Remove sysfs entries for an hba. */ static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h) { device_del(&h->dev); put_device(&h->dev); /* final put. */ } /* cciss_device_release is called when the reference count * of h->drv[x]dev goes to zero. */ static void cciss_device_release(struct device *dev) { drive_info_struct *drv = to_drv(dev); kfree(drv); } /* * Initialize sysfs for each logical drive. This sets up and registers * the 'c#d#' directory for each individual logical drive under * /sys/bus/pci/devices/drv[drv_index]->device_initialized) return 0; dev = &h->drv[drv_index]->dev; device_initialize(dev); dev->type = &cciss_dev_type; dev->bus = &cciss_bus_type; dev_set_name(dev, "c%dd%d", h->ctlr, drv_index); dev->parent = &h->dev; h->drv[drv_index]->device_initialized = 1; return device_add(dev); } /* * Remove sysfs entries for a logical drive. */ static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index, int ctlr_exiting) { struct device *dev = &h->drv[drv_index]->dev; /* special case for c*d0, we only destroy it on controller exit */ if (drv_index == 0 && !ctlr_exiting) return; device_del(dev); put_device(dev); /* the "final" put. */ h->drv[drv_index] = NULL; } /* * For operations that cannot sleep, a command block is allocated at init, * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track * which ones are free or in use. */ static CommandList_struct *cmd_alloc(ctlr_info_t *h) { CommandList_struct *c; int i; u64bit temp64; dma_addr_t cmd_dma_handle, err_dma_handle; do { i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); if (i == h->nr_cmds) return NULL; } while (test_and_set_bit(i, h->cmd_pool_bits) != 0); c = h->cmd_pool + i; memset(c, 0, sizeof(CommandList_struct)); cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct); c->err_info = h->errinfo_pool + i; memset(c->err_info, 0, sizeof(ErrorInfo_struct)); err_dma_handle = h->errinfo_pool_dhandle + i * sizeof(ErrorInfo_struct); h->nr_allocs++; c->cmdindex = i; INIT_LIST_HEAD(&c->list); c->busaddr = (__u32) cmd_dma_handle; temp64.val = (__u64) err_dma_handle; c->ErrDesc.Addr.lower = temp64.val32.lower; c->ErrDesc.Addr.upper = temp64.val32.upper; c->ErrDesc.Len = sizeof(ErrorInfo_struct); c->ctlr = h->ctlr; return c; } /* allocate a command using pci_alloc_consistent, used for ioctls, * etc., not for the main i/o path. */ static CommandList_struct *cmd_special_alloc(ctlr_info_t *h) { CommandList_struct *c; u64bit temp64; dma_addr_t cmd_dma_handle, err_dma_handle; c = (CommandList_struct *) pci_alloc_consistent(h->pdev, sizeof(CommandList_struct), &cmd_dma_handle); if (c == NULL) return NULL; memset(c, 0, sizeof(CommandList_struct)); c->cmdindex = -1; c->err_info = (ErrorInfo_struct *) pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct), &err_dma_handle); if (c->err_info == NULL) { pci_free_consistent(h->pdev, sizeof(CommandList_struct), c, cmd_dma_handle); return NULL; } memset(c->err_info, 0, sizeof(ErrorInfo_struct)); INIT_LIST_HEAD(&c->list); c->busaddr = (__u32) cmd_dma_handle; temp64.val = (__u64) err_dma_handle; c->ErrDesc.Addr.lower = temp64.val32.lower; c->ErrDesc.Addr.upper = temp64.val32.upper; c->ErrDesc.Len = sizeof(ErrorInfo_struct); c->ctlr = h->ctlr; return c; } static void cmd_free(ctlr_info_t *h, CommandList_struct *c) { int i; i = c - h->cmd_pool; clear_bit(i, h->cmd_pool_bits); h->nr_frees++; } static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c) { u64bit temp64; temp64.val32.lower = c->ErrDesc.Addr.lower; temp64.val32.upper = c->ErrDesc.Addr.upper; pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct), c->err_info, (dma_addr_t) temp64.val); pci_free_consistent(h->pdev, sizeof(CommandList_struct), c, (dma_addr_t) cciss_tag_discard_error_bits(h, (u32) c->busaddr)); } static inline ctlr_info_t *get_host(struct gendisk *disk) { return disk->queue->queuedata; } static inline drive_info_struct *get_drv(struct gendisk *disk) { return disk->private_data; } /* * Open. Make sure the device is really there. */ static int cciss_open(struct block_device *bdev, fmode_t mode) { ctlr_info_t *h = get_host(bdev->bd_disk); drive_info_struct *drv = get_drv(bdev->bd_disk); dev_dbg(&h->pdev->dev, "cciss_open %s\n", bdev->bd_disk->disk_name); if (drv->busy_configuring) return -EBUSY; /* * Root is allowed to open raw volume zero even if it's not configured * so array config can still work. Root is also allowed to open any * volume that has a LUN ID, so it can issue IOCTL to reread the * disk information. I don't think I really like this * but I'm already using way to many device nodes to claim another one * for "raw controller". */ if (drv->heads == 0) { if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */ /* if not node 0 make sure it is a partition = 0 */ if (MINOR(bdev->bd_dev) & 0x0f) { return -ENXIO; /* if it is, make sure we have a LUN ID */ } else if (memcmp(drv->LunID, CTLR_LUNID, sizeof(drv->LunID))) { return -ENXIO; } } if (!capable(CAP_SYS_ADMIN)) return -EPERM; } drv->usage_count++; h->usage_count++; return 0; } static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode) { int ret; mutex_lock(&cciss_mutex); ret = cciss_open(bdev, mode); mutex_unlock(&cciss_mutex); return ret; } /* * Close. Sync first. */ static void cciss_release(struct gendisk *disk, fmode_t mode) { ctlr_info_t *h; drive_info_struct *drv; mutex_lock(&cciss_mutex); h = get_host(disk); drv = get_drv(disk); dev_dbg(&h->pdev->dev, "cciss_release %s\n", disk->disk_name); drv->usage_count--; h->usage_count--; mutex_unlock(&cciss_mutex); } #ifdef CONFIG_COMPAT static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg); static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg); static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg) { switch (cmd) { case CCISS_GETPCIINFO: case CCISS_GETINTINFO: case CCISS_SETINTINFO: case CCISS_GETNODENAME: case CCISS_SETNODENAME: case CCISS_GETHEARTBEAT: case CCISS_GETBUSTYPES: case CCISS_GETFIRMVER: case CCISS_GETDRIVVER: case CCISS_REVALIDVOLS: case CCISS_DEREGDISK: case CCISS_REGNEWDISK: case CCISS_REGNEWD: case CCISS_RESCANDISK: case CCISS_GETLUNINFO: return cciss_ioctl(bdev, mode, cmd, arg); case CCISS_PASSTHRU32: return cciss_ioctl32_passthru(bdev, mode, cmd, arg); case CCISS_BIG_PASSTHRU32: return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg); default: return -ENOIOCTLCMD; } } static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg) { IOCTL32_Command_struct __user *arg32 = (IOCTL32_Command_struct __user *) arg; IOCTL_Command_struct arg64; IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); int err; u32 cp; err = 0; err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, sizeof(arg64.LUN_info)); err |= copy_from_user(&arg64.Request, &arg32->Request, sizeof(arg64.Request)); err |= copy_from_user(&arg64.error_info, &arg32->error_info, sizeof(arg64.error_info)); err |= get_user(arg64.buf_size, &arg32->buf_size); err |= get_user(cp, &arg32->buf); arg64.buf = compat_ptr(cp); err |= copy_to_user(p, &arg64, sizeof(arg64)); if (err) return -EFAULT; err = cciss_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p); if (err) return err; err |= copy_in_user(&arg32->error_info, &p->error_info, sizeof(arg32->error_info)); if (err) return -EFAULT; return err; } static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg) { BIG_IOCTL32_Command_struct __user *arg32 = (BIG_IOCTL32_Command_struct __user *) arg; BIG_IOCTL_Command_struct arg64; BIG_IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); int err; u32 cp; memset(&arg64, 0, sizeof(arg64)); err = 0; err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, sizeof(arg64.LUN_info)); err |= copy_from_user(&arg64.Request, &arg32->Request, sizeof(arg64.Request)); err |= copy_from_user(&arg64.error_info, &arg32->error_info, sizeof(arg64.error_info)); err |= get_user(arg64.buf_size, &arg32->buf_size); err |= get_user(arg64.malloc_size, &arg32->malloc_size); err |= get_user(cp, &arg32->buf); arg64.buf = compat_ptr(cp); err |= copy_to_user(p, &arg64, sizeof(arg64)); if (err) return -EFAULT; err = cciss_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p); if (err) return err; err |= copy_in_user(&arg32->error_info, &p->error_info, sizeof(arg32->error_info)); if (err) return -EFAULT; return err; } #endif static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo) { drive_info_struct *drv = get_drv(bdev->bd_disk); if (!drv->cylinders) return -ENXIO; geo->heads = drv->heads; geo->sectors = drv->sectors; geo->cylinders = drv->cylinders; return 0; } static void check_ioctl_unit_attention(ctlr_info_t *h, CommandList_struct *c) { if (c->err_info->CommandStatus == CMD_TARGET_STATUS && c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) (void)check_for_unit_attention(h, c); } static int cciss_getpciinfo(ctlr_info_t *h, void __user *argp) { cciss_pci_info_struct pciinfo; if (!argp) return -EINVAL; pciinfo.domain = pci_domain_nr(h->pdev->bus); pciinfo.bus = h->pdev->bus->number; pciinfo.dev_fn = h->pdev->devfn; pciinfo.board_id = h->board_id; if (copy_to_user(argp, &pciinfo, sizeof(cciss_pci_info_struct))) return -EFAULT; return 0; } static int cciss_getintinfo(ctlr_info_t *h, void __user *argp) { cciss_coalint_struct intinfo; unsigned long flags; if (!argp) return -EINVAL; spin_lock_irqsave(&h->lock, flags); intinfo.delay = readl(&h->cfgtable->HostWrite.CoalIntDelay); intinfo.count = readl(&h->cfgtable->HostWrite.CoalIntCount); spin_unlock_irqrestore(&h->lock, flags); if (copy_to_user (argp, &intinfo, sizeof(cciss_coalint_struct))) return -EFAULT; return 0; } static int cciss_setintinfo(ctlr_info_t *h, void __user *argp) { cciss_coalint_struct intinfo; unsigned long flags; int i; if (!argp) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (copy_from_user(&intinfo, argp, sizeof(intinfo))) return -EFAULT; if ((intinfo.delay == 0) && (intinfo.count == 0)) return -EINVAL; spin_lock_irqsave(&h->lock, flags); /* Update the field, and then ring the doorbell */ writel(intinfo.delay, &(h->cfgtable->HostWrite.CoalIntDelay)); writel(intinfo.count, &(h->cfgtable->HostWrite.CoalIntCount)); writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) break; udelay(1000); /* delay and try again */ } spin_unlock_irqrestore(&h->lock, flags); if (i >= MAX_IOCTL_CONFIG_WAIT) return -EAGAIN; return 0; } static int cciss_getnodename(ctlr_info_t *h, void __user *argp) { NodeName_type NodeName; unsigned long flags; int i; if (!argp) return -EINVAL; spin_lock_irqsave(&h->lock, flags); for (i = 0; i < 16; i++) NodeName[i] = readb(&h->cfgtable->ServerName[i]); spin_unlock_irqrestore(&h->lock, flags); if (copy_to_user(argp, NodeName, sizeof(NodeName_type))) return -EFAULT; return 0; } static int cciss_setnodename(ctlr_info_t *h, void __user *argp) { NodeName_type NodeName; unsigned long flags; int i; if (!argp) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (copy_from_user(NodeName, argp, sizeof(NodeName_type))) return -EFAULT; spin_lock_irqsave(&h->lock, flags); /* Update the field, and then ring the doorbell */ for (i = 0; i < 16; i++) writeb(NodeName[i], &h->cfgtable->ServerName[i]); writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) { if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) break; udelay(1000); /* delay and try again */ } spin_unlock_irqrestore(&h->lock, flags); if (i >= MAX_IOCTL_CONFIG_WAIT) return -EAGAIN; return 0; } static int cciss_getheartbeat(ctlr_info_t *h, void __user *argp) { Heartbeat_type heartbeat; unsigned long flags; if (!argp) return -EINVAL; spin_lock_irqsave(&h->lock, flags); heartbeat = readl(&h->cfgtable->HeartBeat); spin_unlock_irqrestore(&h->lock, flags); if (copy_to_user(argp, &heartbeat, sizeof(Heartbeat_type))) return -EFAULT; return 0; } static int cciss_getbustypes(ctlr_info_t *h, void __user *argp) { BusTypes_type BusTypes; unsigned long flags; if (!argp) return -EINVAL; spin_lock_irqsave(&h->lock, flags); BusTypes = readl(&h->cfgtable->BusTypes); spin_unlock_irqrestore(&h->lock, flags); if (copy_to_user(argp, &BusTypes, sizeof(BusTypes_type))) return -EFAULT; return 0; } static int cciss_getfirmver(ctlr_info_t *h, void __user *argp) { FirmwareVer_type firmware; if (!argp) return -EINVAL; memcpy(firmware, h->firm_ver, 4); if (copy_to_user (argp, firmware, sizeof(FirmwareVer_type))) return -EFAULT; return 0; } static int cciss_getdrivver(ctlr_info_t *h, void __user *argp) { DriverVer_type DriverVer = DRIVER_VERSION; if (!argp) return -EINVAL; if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type))) return -EFAULT; return 0; } static int cciss_getluninfo(ctlr_info_t *h, struct gendisk *disk, void __user *argp) { LogvolInfo_struct luninfo; drive_info_struct *drv = get_drv(disk); if (!argp) return -EINVAL; memcpy(&luninfo.LunID, drv->LunID, sizeof(luninfo.LunID)); luninfo.num_opens = drv->usage_count; luninfo.num_parts = 0; if (copy_to_user(argp, &luninfo, sizeof(LogvolInfo_struct))) return -EFAULT; return 0; } static int cciss_passthru(ctlr_info_t *h, void __user *argp) { IOCTL_Command_struct iocommand; CommandList_struct *c; char *buff = NULL; u64bit temp64; DECLARE_COMPLETION_ONSTACK(wait); if (!argp) return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; if (copy_from_user (&iocommand, argp, sizeof(IOCTL_Command_struct))) return -EFAULT; if ((iocommand.buf_size < 1) && (iocommand.Request.Type.Direction != XFER_NONE)) { return -EINVAL; } if (iocommand.buf_size > 0) { buff = kmalloc(iocommand.buf_size, GFP_KERNEL); if (buff == NULL) return -EFAULT; } if (iocommand.Request.Type.Direction == XFER_WRITE) { /* Copy the data into the buffer we created */ if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) { kfree(buff); return -EFAULT; } } else { memset(buff, 0, iocommand.buf_size); } c = cmd_special_alloc(h); if (!c) { kfree(buff); return -ENOMEM; } /* Fill in the command type */ c->cmd_type = CMD_IOCTL_PEND; /* Fill in Command Header */ c->Header.ReplyQueue = 0; /* unused in simple mode */ if (iocommand.buf_size > 0) { /* buffer to fill */ c->Header.SGList = 1; c->Header.SGTotal = 1; } else { /* no buffers to fill */ c->Header.SGList = 0; c->Header.SGTotal = 0; } c->Header.LUN = iocommand.LUN_info; /* use the kernel address the cmd block for tag */ c->Header.Tag.lower = c->busaddr; /* Fill in Request block */ c->Request = iocommand.Request; /* Fill in the scatter gather information */ if (iocommand.buf_size > 0) { temp64.val = pci_map_single(h->pdev, buff, iocommand.buf_size, PCI_DMA_BIDIRECTIONAL); c->SG[0].Addr.lower = temp64.val32.lower; c->SG[0].Addr.upper = temp64.val32.upper; c->SG[0].Len = iocommand.buf_size; c->SG[0].Ext = 0; /* we are not chaining */ } c->waiting = &wait; enqueue_cmd_and_start_io(h, c); wait_for_completion(&wait); /* unlock the buffers from DMA */ temp64.val32.lower = c->SG[0].Addr.lower; temp64.val32.upper = c->SG[0].Addr.upper; pci_unmap_single(h->pdev, (dma_addr_t) temp64.val, iocommand.buf_size, PCI_DMA_BIDIRECTIONAL); check_ioctl_unit_attention(h, c); /* Copy the error information out */ iocommand.error_info = *(c->err_info); if (copy_to_user(argp, &iocommand, sizeof(IOCTL_Command_struct))) { kfree(buff); cmd_special_free(h, c); return -EFAULT; } if (iocommand.Request.Type.Direction == XFER_READ) { /* Copy the data out of the buffer we created */ if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) { kfree(buff); cmd_special_free(h, c); return -EFAULT; } } kfree(buff); cmd_special_free(h, c); return 0; } static int cciss_bigpassthru(ctlr_info_t *h, void __user *argp) { BIG_IOCTL_Command_struct *ioc; CommandList_struct *c; unsigned char **buff = NULL; int *buff_size = NULL; u64bit temp64; BYTE sg_used = 0; int status = 0; int i; DECLARE_COMPLETION_ONSTACK(wait); __u32 left; __u32 sz; BYTE __user *data_ptr; if (!argp) return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); if (!ioc) { status = -ENOMEM; goto cleanup1; } if (copy_from_user(ioc, argp, sizeof(*ioc))) { status = -EFAULT; goto cleanup1; } if ((ioc->buf_size < 1) && (ioc->Request.Type.Direction != XFER_NONE)) { status = -EINVAL; goto cleanup1; } /* Check kmalloc limits using all SGs */ if (ioc->malloc_size > MAX_KMALLOC_SIZE) { status = -EINVAL; goto cleanup1; } if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) { status = -EINVAL; goto cleanup1; } buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL); if (!buff) { status = -ENOMEM; goto cleanup1; } buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL); if (!buff_size) { status = -ENOMEM; goto cleanup1; } left = ioc->buf_size; data_ptr = ioc->buf; while (left) { sz = (left > ioc->malloc_size) ? ioc->malloc_size : left; buff_size[sg_used] = sz; buff[sg_used] = kmalloc(sz, GFP_KERNEL); if (buff[sg_used] == NULL) { status = -ENOMEM; goto cleanup1; } if (ioc->Request.Type.Direction == XFER_WRITE) { if (copy_from_user(buff[sg_used], data_ptr, sz)) { status = -EFAULT; goto cleanup1; } } else { memset(buff[sg_used], 0, sz); } left -= sz; data_ptr += sz; sg_used++; } c = cmd_special_alloc(h); if (!c) { status = -ENOMEM; goto cleanup1; } c->cmd_type = CMD_IOCTL_PEND; c->Header.ReplyQueue = 0; c->Header.SGList = sg_used; c->Header.SGTotal = sg_used; c->Header.LUN = ioc->LUN_info; c->Header.Tag.lower = c->busaddr; c->Request = ioc->Request; for (i = 0; i < sg_used; i++) { temp64.val = pci_map_single(h->pdev, buff[i], buff_size[i], PCI_DMA_BIDIRECTIONAL); c->SG[i].Addr.lower = temp64.val32.lower; c->SG[i].Addr.upper = temp64.val32.upper; c->SG[i].Len = buff_size[i]; c->SG[i].Ext = 0; /* we are not chaining */ } c->waiting = &wait; enqueue_cmd_and_start_io(h, c); wait_for_completion(&wait); /* unlock the buffers from DMA */ for (i = 0; i < sg_used; i++) { temp64.val32.lower = c->SG[i].Addr.lower; temp64.val32.upper = c->SG[i].Addr.upper; pci_unmap_single(h->pdev, (dma_addr_t) temp64.val, buff_size[i], PCI_DMA_BIDIRECTIONAL); } check_ioctl_unit_attention(h, c); /* Copy the error information out */ ioc->error_info = *(c->err_info); if (copy_to_user(argp, ioc, sizeof(*ioc))) { cmd_special_free(h, c); status = -EFAULT; goto cleanup1; } if (ioc->Request.Type.Direction == XFER_READ) { /* Copy the data out of the buffer we created */ BYTE __user *ptr = ioc->buf; for (i = 0; i < sg_used; i++) { if (copy_to_user(ptr, buff[i], buff_size[i])) { cmd_special_free(h, c); status = -EFAULT; goto cleanup1; } ptr += buff_size[i]; } } cmd_special_free(h, c); status = 0; cleanup1: if (buff) { for (i = 0; i < sg_used; i++) kfree(buff[i]); kfree(buff); } kfree(buff_size); kfree(ioc); return status; } static int cciss_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { struct gendisk *disk = bdev->bd_disk; ctlr_info_t *h = get_host(disk); void __user *argp = (void __user *)arg; dev_dbg(&h->pdev->dev, "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg); switch (cmd) { case CCISS_GETPCIINFO: return cciss_getpciinfo(h, argp); case CCISS_GETINTINFO: return cciss_getintinfo(h, argp); case CCISS_SETINTINFO: return cciss_setintinfo(h, argp); case CCISS_GETNODENAME: return cciss_getnodename(h, argp); case CCISS_SETNODENAME: return cciss_setnodename(h, argp); case CCISS_GETHEARTBEAT: return cciss_getheartbeat(h, argp); case CCISS_GETBUSTYPES: return cciss_getbustypes(h, argp); case CCISS_GETFIRMVER: return cciss_getfirmver(h, argp); case CCISS_GETDRIVVER: return cciss_getdrivver(h, argp); case CCISS_DEREGDISK: case CCISS_REGNEWD: case CCISS_REVALIDVOLS: return rebuild_lun_table(h, 0, 1); case CCISS_GETLUNINFO: return cciss_getluninfo(h, disk, argp); case CCISS_PASSTHRU: return cciss_passthru(h, argp); case CCISS_BIG_PASSTHRU: return cciss_bigpassthru(h, argp); /* scsi_cmd_blk_ioctl handles these, below, though some are not */ /* very meaningful for cciss. SG_IO is the main one people want. */ case SG_GET_VERSION_NUM: case SG_SET_TIMEOUT: case SG_GET_TIMEOUT: case SG_GET_RESERVED_SIZE: case SG_SET_RESERVED_SIZE: case SG_EMULATED_HOST: case SG_IO: case SCSI_IOCTL_SEND_COMMAND: return scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); /* scsi_cmd_blk_ioctl would normally handle these, below, but */ /* they aren't a good fit for cciss, as CD-ROMs are */ /* not supported, and we don't have any bus/target/lun */ /* which we present to the kernel. */ case CDROM_SEND_PACKET: case CDROMCLOSETRAY: case CDROMEJECT: case SCSI_IOCTL_GET_IDLUN: case SCSI_IOCTL_GET_BUS_NUMBER: default: return -ENOTTY; } } static void cciss_check_queues(ctlr_info_t *h) { int start_queue = h->next_to_run; int i; /* check to see if we have maxed out the number of commands that can * be placed on the queue. If so then exit. We do this check here * in case the interrupt we serviced was from an ioctl and did not * free any new commands. */ if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) return; /* We have room on the queue for more commands. Now we need to queue * them up. We will also keep track of the next queue to run so * that every queue gets a chance to be started first. */ for (i = 0; i < h->highest_lun + 1; i++) { int curr_queue = (start_queue + i) % (h->highest_lun + 1); /* make sure the disk has been added and the drive is real * because this can be called from the middle of init_one. */ if (!h->drv[curr_queue]) continue; if (!(h->drv[curr_queue]->queue) || !(h->drv[curr_queue]->heads)) continue; blk_start_queue(h->gendisk[curr_queue]->queue); /* check to see if we have maxed out the number of commands * that can be placed on the queue. */ if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) { if (curr_queue == start_queue) { h->next_to_run = (start_queue + 1) % (h->highest_lun + 1); break; } else { h->next_to_run = curr_queue; break; } } } } static void cciss_softirq_done(struct request *rq) { CommandList_struct *c = rq->completion_data; ctlr_info_t *h = hba[c->ctlr]; SGDescriptor_struct *curr_sg = c->SG; u64bit temp64; unsigned long flags; int i, ddir; int sg_index = 0; if (c->Request.Type.Direction == XFER_READ) ddir = PCI_DMA_FROMDEVICE; else ddir = PCI_DMA_TODEVICE; /* command did not need to be retried */ /* unmap the DMA mapping for all the scatter gather elements */ for (i = 0; i < c->Header.SGList; i++) { if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) { cciss_unmap_sg_chain_block(h, c); /* Point to the next block */ curr_sg = h->cmd_sg_list[c->cmdindex]; sg_index = 0; } temp64.val32.lower = curr_sg[sg_index].Addr.lower; temp64.val32.upper = curr_sg[sg_index].Addr.upper; pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len, ddir); ++sg_index; } dev_dbg(&h->pdev->dev, "Done with %p\n", rq); /* set the residual count for pc requests */ if (rq->cmd_type == REQ_TYPE_BLOCK_PC) rq->resid_len = c->err_info->ResidualCnt; blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO); spin_lock_irqsave(&h->lock, flags); cmd_free(h, c); cciss_check_queues(h); spin_unlock_irqrestore(&h->lock, flags); } static inline void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[], uint32_t log_unit) { memcpy(scsi3addr, h->drv[log_unit]->LunID, sizeof(h->drv[log_unit]->LunID)); } /* This function gets the SCSI vendor, model, and revision of a logical drive * via the inquiry page 0. Model, vendor, and rev are set to empty strings if * they cannot be read. */ static void cciss_get_device_descr(ctlr_info_t *h, int logvol, char *vendor, char *model, char *rev) { int rc; InquiryData_struct *inq_buf; unsigned char scsi3addr[8]; *vendor = '\0'; *model = '\0'; *rev = '\0'; inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); if (!inq_buf) return; log_unit_to_scsi3addr(h, scsi3addr, logvol); rc = sendcmd_withirq(h, CISS_INQUIRY, inq_buf, sizeof(*inq_buf), 0, scsi3addr, TYPE_CMD); if (rc == IO_OK) { memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN); vendor[VENDOR_LEN] = '\0'; memcpy(model, &inq_buf->data_byte[16], MODEL_LEN); model[MODEL_LEN] = '\0'; memcpy(rev, &inq_buf->data_byte[32], REV_LEN); rev[REV_LEN] = '\0'; } kfree(inq_buf); return; } /* This function gets the serial number of a logical drive via * inquiry page 0x83. Serial no. is 16 bytes. If the serial * number cannot be had, for whatever reason, 16 bytes of 0xff * are returned instead. */ static void cciss_get_serial_no(ctlr_info_t *h, int logvol, unsigned char *serial_no, int buflen) { #define PAGE_83_INQ_BYTES 64 int rc; unsigned char *buf; unsigned char scsi3addr[8]; if (buflen > 16) buflen = 16; memset(serial_no, 0xff, buflen); buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL); if (!buf) return; memset(serial_no, 0, buflen); log_unit_to_scsi3addr(h, scsi3addr, logvol); rc = sendcmd_withirq(h, CISS_INQUIRY, buf, PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD); if (rc == IO_OK) memcpy(serial_no, &buf[8], buflen); kfree(buf); return; } /* * cciss_add_disk sets up the block device queue for a logical drive */ static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk, int drv_index) { disk->queue = blk_init_queue(do_cciss_request, &h->lock); if (!disk->queue) goto init_queue_failure; 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; if (cciss_create_ld_sysfs_entry(h, drv_index)) goto cleanup_queue; disk->private_data = h->drv[drv_index]; disk->driverfs_dev = &h->drv[drv_index]->dev; /* Set up queue information */ blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask); /* This is a hardware imposed limit. */ blk_queue_max_segments(disk->queue, h->maxsgentries); blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors); blk_queue_softirq_done(disk->queue, cciss_softirq_done); disk->queue->queuedata = h; blk_queue_logical_block_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); return 0; cleanup_queue: blk_cleanup_queue(disk->queue); disk->queue = NULL; init_queue_failure: return -1; } /* 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, * then the drive information will be updated and the disk will be * re-registered with the kernel. If these conditions don't hold, * then it will be left alone for the next reboot. The exception to this * is disk 0 which will always be left registered with the kernel since it * is also the controller node. Any changes to disk 0 will show up on * the next reboot. */ static void cciss_update_drive_info(ctlr_info_t *h, int drv_index, int first_time, int via_ioctl) { struct gendisk *disk; InquiryData_struct *inq_buff = NULL; unsigned int block_size; sector_t total_size; unsigned long flags = 0; int ret = 0; drive_info_struct *drvinfo; /* Get information about the disk and modify the driver structure */ inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL); if (inq_buff == NULL || drvinfo == NULL) goto mem_msg; /* testing to see if 16-byte CDBs are already being used */ if (h->cciss_read == CCISS_READ_16) { cciss_read_capacity_16(h, drv_index, &total_size, &block_size); } else { cciss_read_capacity(h, drv_index, &total_size, &block_size); /* if read_capacity returns all F's this volume is >2TB */ /* in size so we switch to 16-byte CDB's for all */ /* read/write ops */ if (total_size == 0xFFFFFFFFULL) { cciss_read_capacity_16(h, drv_index, &total_size, &block_size); h->cciss_read = CCISS_READ_16; h->cciss_write = CCISS_WRITE_16; } else { h->cciss_read = CCISS_READ_10; h->cciss_write = CCISS_WRITE_10; } } cciss_geometry_inquiry(h, drv_index, total_size, block_size, inq_buff, drvinfo); drvinfo->block_size = block_size; drvinfo->nr_blocks = total_size + 1; cciss_get_device_descr(h, drv_index, drvinfo->vendor, drvinfo->model, drvinfo->rev); cciss_get_serial_no(h, drv_index, drvinfo->serial_no, sizeof(drvinfo->serial_no)); /* Save the lunid in case we deregister the disk, below. */ memcpy(drvinfo->LunID, h->drv[drv_index]->LunID, sizeof(drvinfo->LunID)); /* Is it the same disk we already know, and nothing's changed? */ if (h->drv[drv_index]->raid_level != -1 && ((memcmp(drvinfo->serial_no, h->drv[drv_index]->serial_no, 16) == 0) && drvinfo->block_size == h->drv[drv_index]->block_size && 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)) /* The disk is unchanged, nothing to update */ goto freeret; /* 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) { dev_warn(&h->pdev->dev, "disk %d has changed.\n", drv_index); spin_lock_irqsave(&h->lock, flags); h->drv[drv_index]->busy_configuring = 1; spin_unlock_irqrestore(&h->lock, flags); /* deregister_disk sets h->drv[drv_index]->queue = NULL * which keeps the interrupt handler from starting * the queue. */ ret = deregister_disk(h, drv_index, 0, via_ioctl); } /* If the disk is in use return */ if (ret) goto freeret; /* Save the new information from cciss_geometry_inquiry * and serial number inquiry. If the disk was deregistered * above, then h->drv[drv_index] will be NULL. */ if (h->drv[drv_index] == NULL) { drvinfo->device_initialized = 0; h->drv[drv_index] = drvinfo; drvinfo = NULL; /* so it won't be freed below. */ } else { /* special case for cxd0 */ 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; h->drv[drv_index]->sectors = drvinfo->sectors; h->drv[drv_index]->cylinders = drvinfo->cylinders; h->drv[drv_index]->raid_level = drvinfo->raid_level; memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16); memcpy(h->drv[drv_index]->vendor, drvinfo->vendor, VENDOR_LEN + 1); memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1); memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1); } ++h->num_luns; disk = h->gendisk[drv_index]; set_capacity(disk, h->drv[drv_index]->nr_blocks); /* 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) { if (cciss_add_disk(h, disk, drv_index) != 0) { cciss_free_gendisk(h, drv_index); cciss_free_drive_info(h, drv_index); dev_warn(&h->pdev->dev, "could not update disk %d\n", drv_index); --h->num_luns; } } freeret: kfree(inq_buff); kfree(drvinfo); return; mem_msg: dev_err(&h->pdev->dev, "out of memory\n"); goto freeret; } /* This function will find the first index of the controllers drive array * that has a null drv pointer and allocate the drive info struct and * will return that index This is where new drives will be added. * If the index to be returned is greater than the highest_lun index for * the controller then highest_lun is set * to this new index. * If there are no available indexes or if tha allocation fails, then -1 * is returned. * "controller_node" is used to know if this is a real * logical drive, or just the controller node, which determines if this * counts towards highest_lun. */ static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node) { int i; drive_info_struct *drv; /* Search for an empty slot for our drive info */ for (i = 0; i < CISS_MAX_LUN; i++) { /* if not cxd0 case, and it's occupied, skip it. */ if (h->drv[i] && i != 0) continue; /* * If it's cxd0 case, and drv is alloc'ed already, and a * disk is configured there, skip it. */ if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1) continue; /* * We've found an empty slot. Update highest_lun * provided this isn't just the fake cxd0 controller node. */ if (i > h->highest_lun && !controller_node) h->highest_lun = i; /* If adding a real disk at cxd0, and it's already alloc'ed */ if (i == 0 && h->drv[i] != NULL) return i; /* * Found an empty slot, not already alloc'ed. Allocate it. * Mark it with raid_level == -1, so we know it's new later on. */ drv = kzalloc(sizeof(*drv), GFP_KERNEL); if (!drv) return -1; drv->raid_level = -1; /* so we know it's new */ h->drv[i] = drv; return i; } return -1; } static void cciss_free_drive_info(ctlr_info_t *h, int drv_index) { kfree(h->drv[drv_index]); h->drv[drv_index] = NULL; } static void cciss_free_gendisk(ctlr_info_t *h, int drv_index) { put_disk(h->gendisk[drv_index]); h->gendisk[drv_index] = NULL; } /* 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, unsigned char lunid[], int controller_node) { int drv_index; drv_index = cciss_alloc_drive_info(h, controller_node); 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]) { dev_err(&h->pdev->dev, "could not allocate a new disk %d\n", drv_index); goto err_free_drive_info; } } memcpy(h->drv[drv_index]->LunID, lunid, sizeof(h->drv[drv_index]->LunID)); if (cciss_create_ld_sysfs_entry(h, drv_index)) goto err_free_disk; /* 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; err_free_disk: cciss_free_gendisk(h, drv_index); err_free_drive_info: cciss_free_drive_info(h, drv_index); return -1; } /* 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, CTLR_LUNID, 1); if (drv_index == -1) goto error; 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]; if (cciss_add_disk(h, disk, drv_index) == 0) return; cciss_free_gendisk(h, drv_index); cciss_free_drive_info(h, drv_index); error: dev_warn(&h->pdev->dev, "could not add disk 0.\n"); return; } /* 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 * for the removal of logical drives in the middle of the drive array * without a re-ordering of those drives. * INPUT * h = The controller to perform the operations on */ static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl) { int num_luns; ReportLunData_struct *ld_buff = NULL; int return_code; int listlength = 0; int i; int drv_found; int drv_index = 0; unsigned char lunid[8] = CTLR_LUNID; unsigned long flags; if (!capable(CAP_SYS_RAWIO)) return -EPERM; /* Set busy_configuring flag for this operation */ spin_lock_irqsave(&h->lock, flags); if (h->busy_configuring) { spin_unlock_irqrestore(&h->lock, flags); return -EBUSY; } h->busy_configuring = 1; spin_unlock_irqrestore(&h->lock, flags); ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL); if (ld_buff == NULL) goto mem_msg; return_code = sendcmd_withirq(h, CISS_REPORT_LOG, ld_buff, sizeof(ReportLunData_struct), 0, CTLR_LUNID, TYPE_CMD); if (return_code == IO_OK) listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength); else { /* reading number of logical volumes failed */ dev_warn(&h->pdev->dev, "report logical volume command failed\n"); listlength = 0; goto freeret; } num_luns = listlength / 8; /* 8 bytes per entry */ if (num_luns > CISS_MAX_LUN) { num_luns = CISS_MAX_LUN; dev_warn(&h->pdev->dev, "more luns configured" " on controller than can be handled by" " this