diff options
Diffstat (limited to 'drivers/block/cciss.c')
| -rw-r--r-- | drivers/block/cciss.c | 5415 |
1 files changed, 0 insertions, 5415 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c deleted file mode 100644 index 678af946be30..000000000000 --- a/drivers/block/cciss.c +++ /dev/null @@ -1,5415 +0,0 @@ -/* - * 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 <linux/module.h> -#include <linux/interrupt.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/pci-aspm.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/major.h> -#include <linux/fs.h> -#include <linux/bio.h> -#include <linux/blkpg.h> -#include <linux/timer.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/init.h> -#include <linux/jiffies.h> -#include <linux/hdreg.h> -#include <linux/spinlock.h> -#include <linux/compat.h> -#include <linux/mutex.h> -#include <linux/bitmap.h> -#include <linux/io.h> -#include <linux/uaccess.h> - -#include <linux/dma-mapping.h> -#include <linux/blkdev.h> -#include <linux/genhd.h> -#include <linux/completion.h> -#include <scsi/scsi.h> -#include <scsi/sg.h> -#include <scsi/scsi_ioctl.h> -#include <scsi/scsi_request.h> -#include <linux/cdrom.h> -#include <linux/scatterlist.h> -#include <linux/kthread.h> - -#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 <linux/cciss_ioctl.h> - -/* 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}, - {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 int 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); - if (dma_mapping_error(&h->pdev->dev, temp64.val)) { - dev_warn(&h->pdev->dev, - "%s: error mapping chain block for DMA\n", - __func__); - return -1; - } - chain_sg->Addr.lower = temp64.val32.lower; - chain_sg->Addr.upper = temp64.val32.upper; - - return 0; -} - -#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 = memdup_user_nul(buf, length); - if (IS_ERR(buffer)) - return PTR_ERR(buffer); - -#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.) */ - - kfree(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[] = { - 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 */ - 0x40800E11, /* Smart Array 5i */ - 0x409C0E11, /* Smart Array 6400 */ - 0x409D0E11, /* Smart Array 6400 EM */ - 0x40700E11, /* Smart Array 5300 */ - 0x40820E11, /* Smart Array 532 */ - 0x40830E11, /* Smart Array 5312 */ - 0x409A0E11, /* Smart Array 641 */ - 0x409B0E11, /* Smart Array 642 */ - 0x40910E11, /* Smart Array 6i */ -}; - -/* List of controllers which cannot even be soft reset */ -static u32 soft_unresettable_controller[] = { - 0x40800E11, /* Smart Array 5i */ - 0x40700E11, /* Smart Array 5300 */ - 0x40820E11, /* Smart Array 532 */ - 0x40830E11, /* Smart Array 5312 */ - 0x409A0E11, /* Smart Array 641 */ - 0x409B0E11, /* Smart Array 642 */ - 0x40910E11, /* Smart Array 6i */ - /* Exclude 640x boards. These are two pci devices in one slot - * which share a battery backed cache module. One controls the - * cache, the other accesses the cache through the one that controls - * it. If we reset the one controlling the cache, the other will - * likely not be happy. Just forbid resetting this conjoined mess. - */ - 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/<dev>/. - */ -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/<dev/ccis#/. We also create a link from - * /sys/block/cciss!c#d# to this entry. - */ -static long cciss_create_ld_sysfs_entry(struct ctlr_info *h, - int drv_index) -{ - struct device *dev; - - if (h->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 = pci_zalloc_consistent(h->pdev, sizeof(CommandList_struct), - &cmd_dma_handle); - if (c == NULL) - return NULL; - - c->cmdindex = -1; - - c->err_info = pci_zalloc_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; - } - - 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; - - 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(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 (blk_rq_is_passthrough(rq)) - scsi_req(rq)->resid_len = c->err_info->ResidualCnt; - blk_end_request_all(rq, scsi_req(rq)->result ? - BLK_STS_IOERR : BLK_STS_OK); - - 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; -} - -static void cciss_initialize_rq(struct request *rq) -{ - struct scsi_request *sreq = blk_mq_rq_to_pdu(rq); - - scsi_req_init(sreq); -} - -/* - * 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_alloc_queue(GFP_KERNEL); - if (!disk->queue) - goto init_queue_failure; - - disk->queue->cmd_size = sizeof(struct scsi_request); - disk->queue->request_fn = do_cciss_request; - disk->queue->initialize_rq_fn = cciss_initialize_rq; - disk->queue->queue_lock = &h->lock; - queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, disk->queue); - if (blk_init_allocated_queue(disk->queue) < 0) - goto cleanup_queue; - - 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]; - - /* 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; - device_add_disk(&h->drv[drv_index]->dev, 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 driver.\n"); - } - - 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; - - /* skip holes in the array from already deleted drives */ - if (h->drv[i] == NULL) - continue; - - for (j = 0; j < num_luns; j++) { - memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid)); - if (memcmp(h->drv[i]->LunID, lunid, - sizeof(lunid)) == 0) { - drv_found = 1; - break; - } - } - if (!drv_found) { - /* Deregister it from the OS, it's gone. */ - spin_lock_irqsave(&h->lock, flags); - h->drv[i]->busy_configuring = 1; - spin_unlock_irqrestore(&h->lock, flags); - return_code = deregister_disk(h, i, 1, via_ioctl); - if (h->drv[i] != NULL) - h->drv[i]->busy_configuring = 0; - } - } - - /* Compare controller drive array to driver's drive array. - * Check for updates in the drive information and any new drives - * on the controller due to ACU adding logical drives, or changing - * a logical drive's size, etc. Reregister any new/changed drives - */ - for (i = 0; i < num_luns; i++) { - int j; - - drv_found = 0; - - memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid)); - /* Find if the LUN is already in the drive array - * of the driver. If so then update its info - * if not in use. If it does not exist then find - * the first free index and add it. - */ - for (j = 0; j <= h->highest_lun; j++) { - if (h->drv[j] != NULL && - memcmp(h->drv[j]->LunID, lunid, - sizeof(h->drv[j]->LunID)) == 0) { - drv_index = j; - drv_found = 1; - break; - } - } - - /* check if the drive was found already in the array */ - if (!drv_found) { - drv_index = cciss_add_gendisk(h, lunid, 0); - if (drv_index == -1) - goto freeret; - } - cciss_update_drive_info(h, drv_index, first_time, via_ioctl); - } /* end for */ - -freeret: - kfree(ld_buff); - h->busy_configuring = 0; - /* We return -1 here to tell the ACU that we have registered/updated - * all of the drives that we can and to keep it from calling us - * additional times. - */ - return -1; -mem_msg: - dev_err(&h->pdev->dev, "out of memory\n"); - h->busy_configuring = 0; - goto freeret; -} - -static void cciss_clear_drive_info(drive_info_struct *drive_info) -{ - /* zero out the disk size info */ - drive_info->nr_blocks = 0; - drive_info->block_size = 0; - drive_info->heads = 0; - drive_info->sectors = 0; - drive_info->cylinders = 0; - drive_info->raid_level = -1; - memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no)); - memset(drive_info->model, 0, sizeof(drive_info->model)); - memset(drive_info->rev, 0, sizeof(drive_info->rev)); - memset(drive_info->vendor, 0, sizeof(drive_info->vendor)); - /* - * don't clear the LUNID though, we need to remember which - * one this one is. - */ -} - -/* This function will deregister the disk and it's queue from the - * kernel. It must be called with the controller lock held and the - * drv structures busy_configuring flag set. It's parameters are: - * - * disk = This is the disk to be deregistered - * drv = This is the drive_info_struct associated with the disk to be - * deregistered. It contains information about the disk used - * by the driver. - * clear_all = This flag determines whether or not the disk information - * is going to be completely cleared out and the highest_lun - * reset. Sometimes we want to clear out information about - * the disk in preparation for re-adding it. In this case - * the highest_lun should be left unchanged and the LunID - * should not be cleared. - * via_ioctl - * This indicates whether we've reached this path via ioctl. - * This affects the maximum usage count allowed for c0d0 to be messed with. - * If this path is reached via ioctl(), then the max_usage_count will - * be 1, as the process calling ioctl() has got to have the device open. - * If we get here via sysfs, then the max usage count will be zero. -*/ -static int deregister_disk(ctlr_info_t *h, int drv_index, - int clear_all, int via_ioctl) -{ - int i; - struct gendisk *disk; - drive_info_struct *drv; - int recalculate_highest_lun; - - if (!capable(CAP_SYS_RAWIO)) - return -EPERM; - - drv = h->drv[drv_index]; - disk = h->gendisk[drv_index]; - - /* make sure logical volume is NOT is use */ - if (clear_all || (h->gendisk[0] == disk)) { - if (drv->usage_count > via_ioctl) - return -EBUSY; - } else if (drv->usage_count > 0) - return -EBUSY; - - recalculate_highest_lun = (drv == h->drv[h->highest_lun]); - - /* invalidate the devices and deregister the disk. If it is disk - * zero do not deregister it but just zero out it's values. This - * allows us to delete disk zero but keep the controller registered. - */ - if (h->gendisk[0] != disk) { - struct request_queue *q = disk->queue; - if (disk->flags & GENHD_FL_UP) { - cciss_destroy_ld_sysfs_entry(h, drv_index, 0); - del_gendisk(disk); - } - if (q) - blk_cleanup_queue(q); - /* 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); - cciss_clear_drive_info(drv); - } - - --h->num_luns; - - /* if it was the last disk, find the new hightest lun */ - if (clear_all && recalculate_highest_lun) { - int newhighest = -1; - for (i = 0; i <= h->highest_lun; i++) { - /* if the disk has size > 0, it is available */ - if (h->drv[i] && h->drv[i]->heads) - newhighest = i; - } - h->highest_lun = newhighest; - } - return 0; -} - -static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, - size_t size, __u8 page_code, unsigned char *scsi3addr, - int cmd_type) -{ - u64bit buff_dma_handle; - int status = IO_OK; - - c->cmd_type = CMD_IOCTL_PEND; - c->Header.ReplyQueue = 0; - if (buff != NULL) { - c->Header.SGList = 1; - c->Header.SGTotal = 1; - } else { - c->Header.SGList = 0; - c->Header.SGTotal = 0; - } - c->Header.Tag.lower = c->busaddr; - memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); - - c->Request.Type.Type = cmd_type; - if (cmd_type == TYPE_CMD) { - switch (cmd) { - case CISS_INQUIRY: - /* are we trying to read a vital product page */ - if (page_code != 0) { - c->Request.CDB[1] = 0x01; - c->Request.CDB[2] = page_code; - } - c->Request.CDBLen = 6; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_READ; - c->Request.Timeout = 0; - c->Request.CDB[0] = CISS_INQUIRY; - c->Request.CDB[4] = size & 0xFF; - break; - case CISS_REPORT_LOG: - case CISS_REPORT_PHYS: - /* Talking to controller so It's a physical command - mode = 00 target = 0. Nothing to write. - */ - c->Request.CDBLen = 12; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_READ; - c->Request.Timeout = 0; - c->Request.CDB[0] = cmd; - c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */ - c->Request.CDB[7] = (size >> 16) & 0xFF; - c->Request.CDB[8] = (size >> 8) & 0xFF; - c->Request.CDB[9] = size & 0xFF; - break; - - case CCISS_READ_CAPACITY: - c->Request.CDBLen = 10; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_READ; - c->Request.Timeout = 0; - c->Request.CDB[0] = cmd; - break; - case CCISS_READ_CAPACITY_16: - c->Request.CDBLen = 16; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_READ; - c->Request.Timeout = 0; - c->Request.CDB[0] = cmd; - c->Request.CDB[1] = 0x10; - c->Request.CDB[10] = (size >> 24) & 0xFF; - c->Request.CDB[11] = (size >> 16) & 0xFF; - c->Request.CDB[12] = (size >> 8) & 0xFF; - c->Request.CDB[13] = size & 0xFF; - c->Request.Timeout = 0; - c->Request.CDB[0] = cmd; - break; - case CCISS_CACHE_FLUSH: - c->Request.CDBLen = 12; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_WRITE; - c->Request.Timeout = 0; - c->Request.CDB[0] = BMIC_WRITE; - c->Request.CDB[6] = BMIC_CACHE_FLUSH; - c->Request.CDB[7] = (size >> 8) & 0xFF; - c->Request.CDB[8] = size & 0xFF; - break; - case TEST_UNIT_READY: - c->Request.CDBLen = 6; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_NONE; - c->Request.Timeout = 0; - break; - default: - dev_warn(&h->pdev->dev, "Unknown Command 0x%c\n", cmd); - return IO_ERROR; - } - } else if (cmd_type == TYPE_MSG) { - switch (cmd) { - case CCISS_ABORT_MSG: - c->Request.CDBLen = 12; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_WRITE; - c->Request.Timeout = 0; - c->Request.CDB[0] = cmd; /* abort */ - c->Request.CDB[1] = 0; /* abort a command */ - /* buff contains the tag of the command to abort */ - memcpy(&c->Request.CDB[4], buff, 8); - break; - case CCISS_RESET_MSG: - c->Request.CDBLen = 16; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_NONE; - c->Request.Timeout = 0; - memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); - c->Request.CDB[0] = cmd; /* reset */ - c->Request.CDB[1] = CCISS_RESET_TYPE_TARGET; - break; - case CCISS_NOOP_MSG: - c->Request.CDBLen = 1; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = XFER_WRITE; - c->Request.Timeout = 0; - c->Request.CDB[0] = cmd; - break; - default: - dev_warn(&h->pdev->dev, - "unknown message type %d\n", cmd); - return IO_ERROR; - } - } else { - dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type); - return IO_ERROR; - } - /* Fill in the scatter gather information */ - if (size > 0) { - buff_dma_handle.val = (__u64) pci_map_single(h->pdev, - buff, size, - PCI_DMA_BIDIRECTIONAL); - c->SG[0].Addr.lower = buff_dma_handle.val32.lower; - c->SG[0].Addr.upper = buff_dma_handle.val32.upper; - c->SG[0].Len = size; - c->SG[0].Ext = 0; /* we are not chaining */ - } - return status; -} - -static int cciss_send_reset(ctlr_info_t *h, unsigned char *scsi3addr, - u8 reset_type) -{ - CommandList_struct *c; - int return_status; - - c = cmd_alloc(h); - if (!c) - return -ENOMEM; - return_status = fill_cmd(h, c, CCISS_RESET_MSG, NULL, 0, 0, - CTLR_LUNID, TYPE_MSG); - c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */ - if (return_status != IO_OK) { - cmd_special_free(h, c); - return return_status; - } - c->waiting = NULL; - enqueue_cmd_and_start_io(h, c); - /* Don't wait for completion, the reset won't complete. Don't free - * the command either. This is the last command we will send before - * re-initializing everything, so it doesn't matter and won't leak. - */ - return 0; -} - -static int check_target_status(ctlr_info_t *h, CommandList_struct *c) -{ - switch (c->err_info->ScsiStatus) { - case SAM_STAT_GOOD: - return IO_OK; - case SAM_STAT_CHECK_CONDITION: - switch (0xf & c->err_info->SenseInfo[2]) { - case 0: return IO_OK; /* no sense */ - case 1: return IO_OK; /* recovered error */ - default: - if (check_for_unit_attention(h, c)) - return IO_NEEDS_RETRY; - dev_warn(&h->pdev->dev, "cmd 0x%02x " - "check condition, sense key = 0x%02x\n", - c->Request.CDB[0], c->err_info->SenseInfo[2]); - } - break; - default: - dev_warn(&h->pdev->dev, "cmd 0x%02x" - "scsi status = 0x%02x\n", - c->Request.CDB[0], c->err_info->ScsiStatus); - break; - } - return IO_ERROR; -} - -static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c) -{ - int return_status = IO_OK; - - if (c->err_info->CommandStatus == CMD_SUCCESS) - return IO_OK; - - switch (c->err_info->CommandStatus) { - case CMD_TARGET_STATUS: - return_status = check_target_status(h, c); - break; - case CMD_DATA_UNDERRUN: - case CMD_DATA_OVERRUN: - /* expected for inquiry and report lun commands */ - break; - case CMD_INVALID: - dev_warn(&h->pdev->dev, "cmd 0x%02x is " - "reported invalid\n", c->Request.CDB[0]); - return_status = IO_ERROR; - break; - case CMD_PROTOCOL_ERR: - dev_warn(&h->pdev->dev, "cmd 0x%02x has " - "protocol error\n", c->Request.CDB[0]); - return_status = IO_ERROR; - break; - case CMD_HARDWARE_ERR: - dev_warn(&h->pdev->dev, "cmd 0x%02x had " - " hardware error\n", c->Request.CDB[0]); - return_status = IO_ERROR; - break; - case CMD_CONNECTION_LOST: - dev_warn(&h->pdev->dev, "cmd 0x%02x had " - "connection lost\n", c->Request.CDB[0]); - return_status = IO_ERROR; - break; - case CMD_ABORTED: - dev_warn(&h->pdev->dev, "cmd 0x%02x was " - "aborted\n", c->Request.CDB[0]); - return_status = IO_ERROR; - break; - case CMD_ABORT_FAILED: - dev_warn(&h->pdev->dev, "cmd 0x%02x reports " - "abort failed\n", c->Request.CDB[0]); - return_status = IO_ERROR; - break; - case CMD_UNSOLICITED_ABORT: - dev_warn(&h->pdev->dev, "unsolicited abort 0x%02x\n", - c->Request.CDB[0]); - return_status = IO_NEEDS_RETRY; - break; - case CMD_UNABORTABLE: - dev_warn(&h->pdev->dev, "cmd unabortable\n"); - return_status = IO_ERROR; - break; - default: - dev_warn(&h->pdev->dev, "cmd 0x%02x returned " - "unknown status %x\n", c->Request.CDB[0], - c->err_info->CommandStatus); - return_status = IO_ERROR; - } - return return_status; -} - -static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, - int attempt_retry) -{ - DECLARE_COMPLETION_ONSTACK(wait); - u64bit buff_dma_handle; - int return_status = IO_OK; - -resend_cmd2: - c->waiting = &wait; - enqueue_cmd_and_start_io(h, c); - - wait_for_completion(&wait); - - if (c->err_info->CommandStatus == 0 || !attempt_retry) - goto command_done; - - return_status = process_sendcmd_error(h, c); - - if (return_status == IO_NEEDS_RETRY && - c->retry_count < MAX_CMD_RETRIES) { - dev_warn(&h->pdev->dev, "retrying 0x%02x\n", - c->Request.CDB[0]); - c->retry_count++; - /* erase the old error information */ - memset(c->err_info, 0, sizeof(ErrorInfo_struct)); - return_status = IO_OK; - reinit_completion(&wait); - goto resend_cmd2; - } - -command_done: - /* unlock the buffers from DMA */ - buff_dma_handle.val32.lower = c->SG[0].Addr.lower; - buff_dma_handle.val32.upper = c->SG[0].Addr.upper; - pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val, - c->SG[0].Len, PCI_DMA_BIDIRECTIONAL); - return return_status; -} - -static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size, - __u8 page_code, unsigned char scsi3addr[], - int cmd_type) -{ - CommandList_struct *c; - int return_status; - - c = cmd_special_alloc(h); - if (!c) - return -ENOMEM; - return_status = fill_cmd(h, c, cmd, buff, size, page_code, - scsi3addr, cmd_type); - if (return_status == IO_OK) - return_status = sendcmd_withirq_core(h, c, 1); - - cmd_special_free(h, c); - return return_status; -} - -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) -{ - int return_code; - unsigned long t; - unsigned char scsi3addr[8]; - - memset(inq_buff, 0, sizeof(InquiryData_struct)); - log_unit_to_scsi3addr(h, scsi3addr, logvol); - return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff, - sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD); - if (return_code == IO_OK) { - if (inq_buff->data_byte[8] == 0xFF) { - dev_warn(&h->pdev->dev, - "reading geometry failed, volume " - "does not support reading geometry\n"); - drv->heads = 255; - drv->sectors = 32; /* Sectors per track */ - drv->cylinders = total_size + 1; - drv->raid_level = RAID_UNKNOWN; - } else { - drv->heads = inq_buff->data_byte[6]; - drv->sectors = inq_buff->data_byte[7]; - drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8; - drv->cylinders += inq_buff->data_byte[5]; - drv->raid_level = inq_buff->data_byte[8]; - } - drv->block_size = block_size; - drv->nr_blocks = total_size + 1; - t = drv->heads * drv->sectors; - if (t > 1) { - sector_t real_size = total_size + 1; - unsigned long rem = sector_div(real_size, t); - if (rem) - real_size++; - drv->cylinders = real_size; - } - } else { /* Get geometry failed */ - dev_warn(&h->pdev->dev, "reading geometry failed\n"); - } -} - -static void -cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size, - unsigned int *block_size) -{ - ReadCapdata_struct *buf; - int return_code; - unsigned char scsi3addr[8]; - - buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL); - if (!buf) { - dev_warn(&h->pdev->dev, "out of memory\n"); - return; - } - - log_unit_to_scsi3addr(h, scsi3addr, logvol); - return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY, buf, - sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD); - if (return_code == IO_OK) { - *total_size = be32_to_cpu(*(__be32 *) buf->total_size); - *block_size = be32_to_cpu(*(__be32 *) buf->block_size); - } else { /* read capacity command failed */ - dev_warn(&h->pdev->dev, "read capacity failed\n"); - *total_size = 0; - *block_size = BLOCK_SIZE; - } - kfree(buf); -} - -static void cciss_read_capacity_16(ctlr_info_t *h, int logvol, - sector_t *total_size, unsigned int *block_size) -{ - ReadCapdata_struct_16 *buf; - int return_code; - unsigned char scsi3addr[8]; - - buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL); - if (!buf) { - dev_warn(&h->pdev->dev, "out of memory\n"); - return; - } - - log_unit_to_scsi3addr(h, scsi3addr, logvol); - return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY_16, - buf, sizeof(ReadCapdata_struct_16), - 0, scsi3addr, TYPE_CMD); - if (return_code == IO_OK) { - *total_size = be64_to_cpu(*(__be64 *) buf->total_size); - *block_size = be32_to_cpu(*(__be32 *) buf->block_size); - } else { /* read capacity command failed */ - dev_warn(&h->pdev->dev, "read capacity failed\n"); - *total_size = 0; - *block_size = BLOCK_SIZE; - } - dev_info(&h->pdev->dev, " blocks= %llu block_size= %d\n", - (unsigned long long)*total_size+1, *block_size); - kfree(buf); -} - -static int cciss_revalidate(struct gendisk *disk) -{ - ctlr_info_t *h = get_host(disk); - drive_info_struct *drv = get_drv(disk); - int logvol; - int FOUND = 0; - unsigned int block_size; - sector_t total_size; - InquiryData_struct *inq_buff = NULL; - - for (logvol = 0; logvol <= h->highest_lun; logvol++) { - if (!h->drv[logvol]) - continue; - if (memcmp(h->drv[logvol]->LunID, drv->LunID, - sizeof(drv->LunID)) == 0) { - FOUND = 1; - break; - } - } - - if (!FOUND) - return 1; - - inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL); - if (inq_buff == NULL) { - dev_warn(&h->pdev->dev, "out of memory\n"); - return 1; - } - if (h->cciss_read == CCISS_READ_10) { - cciss_read_capacity(h, logvol, - &total_size, &block_size); - } else { - cciss_read_capacity_16(h, logvol, - &total_size, &block_size); - } - cciss_geometry_inquiry(h, logvol, total_size, block_size, - inq_buff, drv); - - blk_queue_logical_block_size(drv->queue, drv->block_size); - set_capacity(disk, drv->nr_blocks); - - kfree(inq_buff); - return 0; -} - -/* - * Map (physical) PCI mem into (virtual) kernel space - */ -static void __iomem *remap_pci_mem(ulong base, ulong size) -{ - ulong page_base = ((ulong) base) & PAGE_MASK; - ulong page_offs = ((ulong) base) - page_base; - void __iomem *page_remapped = ioremap(page_base, page_offs + size); - - return page_remapped ? (page_remapped + page_offs) : NULL; -} - -/* - * Takes jobs of the Q and sends them to the hardware, then puts it on - * the Q to wait for completion. - */ -static void start_io(ctlr_info_t *h) -{ - CommandList_struct *c; - - while (!list_empty(&h->reqQ)) { - c = list_entry(h->reqQ.next, CommandList_struct, list); - /* can't do anything if fifo is full */ - if ((h->access.fifo_full(h))) { - dev_warn(&h->pdev->dev, "fifo full\n"); - break; - } - - /* Get the first entry from the Request Q */ - removeQ(c); - h->Qdepth--; - - /* Tell the controller execute command */ - h->access.submit_command(h, c); - - /* Put job onto the completed Q */ - addQ(&h->cmpQ, c); - } -} - -/* Assumes that h->lock is held. */ -/* Zeros out the error record and then resends the command back */ -/* to the controller */ -static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c) -{ - /* erase the old error information */ - memset(c->err_info, 0, sizeof(ErrorInfo_struct)); - - /* add it to software queue and then send it to the controller */ - addQ(&h->reqQ, c); - h->Qdepth++; - if (h->Qdepth > h->maxQsinceinit) - h->maxQsinceinit = h->Qdepth; - - start_io(h); -} - -static inline unsigned int make_status_bytes(unsigned int scsi_status_byte, - unsigned int msg_byte, unsigned int host_byte, - unsigned int driver_byte) -{ - /* inverse of macros in scsi.h */ - return (scsi_status_byte & 0xff) | - ((msg_byte & 0xff) << 8) | - ((host_byte & 0xff) << 16) | - ((driver_byte & 0xff) << 24); -} - -static inline int evaluate_target_status(ctlr_info_t *h, - CommandList_struct *cmd, int *retry_cmd) -{ - unsigned char sense_key; - unsigned char status_byte, msg_byte, host_byte, driver_byte; - int error_value; - - *retry_cmd = 0; - /* If we get in here, it means we got "target status", that is, scsi status */ - status_byte = cmd->err_info->ScsiStatus; - driver_byte = DRIVER_OK; - msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */ - - if (blk_rq_is_passthrough(cmd->rq)) - host_byte = DID_PASSTHROUGH; - else - host_byte = DID_OK; - - error_value = make_status_bytes(status_byte, msg_byte, - host_byte, driver_byte); - - if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) { - if (!blk_rq_is_passthrough(cmd->rq)) - dev_warn(&h->pdev->dev, "cmd %p " - "has SCSI Status 0x%x\n", - cmd, cmd->err_info->ScsiStatus); - return error_value; - } - - /* check the sense key */ - sense_key = 0xf & cmd->err_info->SenseInfo[2]; - /* no status or recovered error */ - if (((sense_key == 0x0) || (sense_key == 0x1)) && - !blk_rq_is_passthrough(cmd->rq)) - error_value = 0; - - if (check_for_unit_attention(h, cmd)) { - *retry_cmd = !blk_rq_is_passthrough(cmd->rq); - return 0; - } - - /* Not SG_IO or similar? */ - if (!blk_rq_is_passthrough(cmd->rq)) { - if (error_value != 0) - dev_warn(&h->pdev->dev, "cmd %p has CHECK CONDITION" - " sense key = 0x%x\n", cmd, sense_key); - return error_value; - } - - scsi_req(cmd->rq)->sense_len = cmd->err_info->SenseLen; - return error_value; -} - -/* checks the status of the job and calls complete buffers to mark all - * buffers for the completed job. Note that this function does not need - * to hold the hba/queue lock. - */ -static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd, - int timeout) -{ - int retry_cmd = 0; - struct request *rq = cmd->rq; - struct scsi_request *sreq = scsi_req(rq); - - sreq->result = 0; - - if (timeout) - sreq->result = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT); - - if (cmd->err_info->CommandStatus == 0) /* no error has occurred */ - goto after_error_processing; - - switch (cmd->err_info->CommandStatus) { - case CMD_TARGET_STATUS: - sreq->result = evaluate_target_status(h, cmd, &retry_cmd); - break; - case CMD_DATA_UNDERRUN: - if (!blk_rq_is_passthrough(cmd->rq)) { - dev_warn(&h->pdev->dev, "cmd %p has" - " completed with data underrun " - "reported\n", cmd); - } - break; - case CMD_DATA_OVERRUN: - if (!blk_rq_is_passthrough(cmd->rq)) - dev_warn(&h->pdev->dev, "cciss: cmd %p has" - " completed with data overrun " - "reported\n", cmd); - break; - case CMD_INVALID: - dev_warn(&h->pdev->dev, "cciss: cmd %p is " - "reported invalid\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - case CMD_PROTOCOL_ERR: - dev_warn(&h->pdev->dev, "cciss: cmd %p has " - "protocol error\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - case CMD_HARDWARE_ERR: - dev_warn(&h->pdev->dev, "cciss: cmd %p had " - " hardware error\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - case CMD_CONNECTION_LOST: - dev_warn(&h->pdev->dev, "cciss: cmd %p had " - "connection lost\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - case CMD_ABORTED: - dev_warn(&h->pdev->dev, "cciss: cmd %p was " - "aborted\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ABORT); - break; - case CMD_ABORT_FAILED: - dev_warn(&h->pdev->dev, "cciss: cmd %p reports " - "abort failed\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - case CMD_UNSOLICITED_ABORT: - dev_warn(&h->pdev->dev, "cciss%d: unsolicited " - "abort %p\n", h->ctlr, cmd); - if (cmd->retry_count < MAX_CMD_RETRIES) { - retry_cmd = 1; - dev_warn(&h->pdev->dev, "retrying %p\n", cmd); - cmd->retry_count++; - } else - dev_warn(&h->pdev->dev, - "%p retried too many times\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ABORT); - break; - case CMD_TIMEOUT: - dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - case CMD_UNABORTABLE: - dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - break; - default: - dev_warn(&h->pdev->dev, "cmd %p returned " - "unknown status %x\n", cmd, - cmd->err_info->CommandStatus); - sreq->result = make_status_bytes(SAM_STAT_GOOD, - cmd->err_info->CommandStatus, DRIVER_OK, - blk_rq_is_passthrough(cmd->rq) ? - DID_PASSTHROUGH : DID_ERROR); - } - -after_error_processing: - - /* We need to return this command */ - if (retry_cmd) { - resend_cciss_cmd(h, cmd); - return; - } - cmd->rq->completion_data = cmd; - blk_complete_request(cmd->rq); -} - -static inline u32 cciss_tag_contains_index(u32 tag) -{ -#define DIRECT_LOOKUP_BIT 0x10 - return tag & DIRECT_LOOKUP_BIT; -} - -static inline u32 cciss_tag_to_index(u32 tag) -{ -#define DIRECT_LOOKUP_SHIFT 5 - return tag >> DIRECT_LOOKUP_SHIFT; -} - -static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag) -{ -#define CCISS_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1) -#define CCISS_SIMPLE_ERROR_BITS 0x03 - if (likely(h->transMethod & CFGTBL_Trans_Performant)) - return tag & ~CCISS_PERF_ERROR_BITS; - return tag & ~CCISS_SIMPLE_ERROR_BITS; -} - -static inline void cciss_mark_tag_indexed(u32 *tag) -{ - *tag |= DIRECT_LOOKUP_BIT; -} - -static inline void cciss_set_tag_index(u32 *tag, u32 index) -{ - *tag |= (index << DIRECT_LOOKUP_SHIFT); -} - -/* - * Get a request and submit it to the controller. - */ -static void do_cciss_request(struct request_queue *q) -{ - ctlr_info_t *h = q->queuedata; - CommandList_struct *c; - sector_t start_blk; - int seg; - struct request *creq; - u64bit temp64; - struct scatterlist *tmp_sg; - SGDescriptor_struct *curr_sg; - drive_info_struct *drv; - int i, dir; - int sg_index = 0; - int chained = 0; - - queue: - creq = blk_peek_request(q); - if (!creq) - goto startio; - - BUG_ON(creq->nr_phys_segments > h->maxsgentries); - - c = cmd_alloc(h); - if (!c) - goto full; - - blk_start_request(creq); - - tmp_sg = h->scatter_list[c->cmdindex]; - spin_unlock_irq(q->queue_lock); - - c->cmd_type = CMD_RWREQ; - c->rq = creq; - - /* fill in the request */ - drv = creq->rq_disk->private_data; - c->Header.ReplyQueue = 0; /* unused in simple mode */ - /* got command from pool, so use the command block index instead */ - /* for direct lookups. */ - /* The first 2 bits are reserved for controller error reporting. */ - cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex); - cciss_mark_tag_indexed(&c->Header.Tag.lower); - memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID)); - c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */ - c->Request.Type.Type = TYPE_CMD; /* It is a command. */ - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = - (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE; - c->Request.Timeout = 0; /* Don't time out */ - c->Request.CDB[0] = - (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write; - start_blk = blk_rq_pos(creq); - dev_dbg(&h->pdev->dev, "sector =%d nr_sectors=%d\n", - (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq)); - sg_init_table(tmp_sg, h->maxsgentries); - seg = blk_rq_map_sg(q, creq, tmp_sg); - - /* get the DMA records for the setup */ - if (c->Request.Type.Direction == XFER_READ) - dir = PCI_DMA_FROMDEVICE; - else - dir = PCI_DMA_TODEVICE; - - curr_sg = c->SG; - sg_index = 0; - chained = 0; - - for (i = 0; i < seg; i++) { - if (((sg_index+1) == (h->max_cmd_sgentries)) && - !chained && ((seg - i) > 1)) { - /* Point to next chain block. */ - curr_sg = h->cmd_sg_list[c->cmdindex]; - sg_index = 0; - chained = 1; - } - curr_sg[sg_index].Len = tmp_sg[i].length; - temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]), - tmp_sg[i].offset, - tmp_sg[i].length, dir); - if (dma_mapping_error(&h->pdev->dev, temp64.val)) { - dev_warn(&h->pdev->dev, - "%s: error mapping page for DMA\n", __func__); - scsi_req(creq)->result = - make_status_bytes(SAM_STAT_GOOD, 0, DRIVER_OK, - DID_SOFT_ERROR); - cmd_free(h, c); - return; - } - curr_sg[sg_index].Addr.lower = temp64.val32.lower; - curr_sg[sg_index].Addr.upper = temp64.val32.upper; - curr_sg[sg_index].Ext = 0; /* we are not chaining */ - ++sg_index; - } - if (chained) { - if (cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex], - (seg - (h->max_cmd_sgentries - 1)) * - sizeof(SGDescriptor_struct))) { - scsi_req(creq)->result = - make_status_bytes(SAM_STAT_GOOD, 0, DRIVER_OK, - DID_SOFT_ERROR); - cmd_free(h, c); - return; - } - } - - /* track how many SG entries we are using */ - if (seg > h->maxSG) - h->maxSG = seg; - - dev_dbg(&h->pdev->dev, "Submitting %u sectors in %d segments " - "chained[%d]\n", - blk_rq_sectors(creq), seg, chained); - - c->Header.SGTotal = seg + chained; - if (seg <= h->max_cmd_sgentries) - c->Header.SGList = c->Header.SGTotal; - else - c->Header.SGList = h->max_cmd_sgentries; - set_performant_mode(h, c); - - switch (req_op(creq)) { - case REQ_OP_READ: - case REQ_OP_WRITE: - if(h->cciss_read == CCISS_READ_10) { - c->Request.CDB[1] = 0; - c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */ - c->Request.CDB[3] = (start_blk >> 16) & 0xff; - c->Request.CDB[4] = (start_blk >> 8) & 0xff; - c->Request.CDB[5] = start_blk & 0xff; - c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */ - c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff; - c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff; - c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0; - } else { - u32 upper32 = upper_32_bits(start_blk); - - c->Request.CDBLen = 16; - c->Request.CDB[1]= 0; - c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */ - c->Request.CDB[3]= (upper32 >> 16) & 0xff; - c->Request.CDB[4]= (upper32 >> 8) & 0xff; - c->Request.CDB[5]= upper32 & 0xff; - c->Request.CDB[6]= (start_blk >> 24) & 0xff; - c->Request.CDB[7]= (start_blk >> 16) & 0xff; - c->Request.CDB[8]= (start_blk >> 8) & 0xff; - c->Request.CDB[9]= start_blk & 0xff; - c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff; - c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff; - c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff; - c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff; - c->Request.CDB[14] = c->Request.CDB[15] = 0; - } - break; - case REQ_OP_SCSI_IN: - case REQ_OP_SCSI_OUT: - c->Request.CDBLen = scsi_req(creq)->cmd_len; - memcpy(c->Request.CDB, scsi_req(creq)->cmd, BLK_MAX_CDB); - scsi_req(creq)->sense = c->err_info->SenseInfo; - break; - default: - dev_warn(&h->pdev->dev, "bad request type %d\n", - creq->cmd_flags); - BUG(); - } - - spin_lock_irq(q->queue_lock); - - addQ(&h->reqQ, c); - h->Qdepth++; - if (h->Qdepth > h->maxQsinceinit) - h->maxQsinceinit = h->Qdepth; - - goto queue; -full: - blk_stop_queue(q); -startio: - /* We will already have the driver lock here so not need - * to lock it. - */ - start_io(h); -} - -static inline unsigned long get_next_completion(ctlr_info_t *h) -{ - return h->access.command_completed(h); -} - -static inline int interrupt_pending(ctlr_info_t *h) -{ - return h->access.intr_pending(h); -} - -static inline long interrupt_not_for_us(ctlr_info_t *h) -{ - return ((h->access.intr_pending(h) == 0) || - (h->interrupts_enabled == 0)); -} - -static inline int bad_tag(ctlr_info_t *h, u32 tag_index, - u32 raw_tag) -{ - if (unlikely(tag_index >= h->nr_cmds)) { - dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag); - return 1; - } - return 0; -} - -static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c, - u32 raw_tag) -{ - removeQ(c); - if (likely(c->cmd_type == CMD_RWREQ)) - complete_command(h, c, 0); - else if (c->cmd_type == CMD_IOCTL_PEND) - complete(c->waiting); -#ifdef CONFIG_CISS_SCSI_TAPE - else if (c->cmd_type == CMD_SCSI) - complete_scsi_command(c, 0, raw_tag); -#endif -} - -static inline u32 next_command(ctlr_info_t *h) -{ - u32 a; - - if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant))) - return h->access.command_completed(h); - - if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { - a = *(h->reply_pool_head); /* Next cmd in ring buffer */ - (h->reply_pool_head)++; - h->commands_outstanding--; - } else { - a = FIFO_EMPTY; - } - /* Check for wraparound */ - if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { - h->reply_pool_head = h->reply_pool; - h->reply_pool_wraparound ^= 1; - } - return a; -} - -/* process completion of an indexed ("direct lookup") command */ -static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag) -{ - u32 tag_index; - CommandList_struct *c; - - tag_index = cciss_tag_to_index(raw_tag); - if (bad_tag(h, tag_index, raw_tag)) - return next_command(h); - c = h->cmd_pool + tag_index; - finish_cmd(h, c, raw_tag); - return next_command(h); -} - -/* process completion of a non-indexed command */ -static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag) -{ - CommandList_struct *c = NULL; - __u32 busaddr_masked, tag_masked; - - tag_masked = cciss_tag_discard_error_bits(h, raw_tag); - list_for_each_entry(c, &h->cmpQ, list) { - busaddr_masked = cciss_tag_discard_error_bits(h, c->busaddr); - if (busaddr_masked == tag_masked) { - finish_cmd(h, c, raw_tag); - return next_command(h); - } - } - bad_tag(h, h->nr_cmds + 1, raw_tag); - return next_command(h); -} - -/* Some controllers, like p400, will give us one interrupt - * after a soft reset, even if we turned interrupts off. - * Only need to check for this in the cciss_xxx_discard_completions - * functions. - */ -static int ignore_bogus_interrupt(ctlr_info_t *h) -{ - if (likely(!reset_devices)) - return 0; - - if (likely(h->interrupts_enabled)) - return 0; - - dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled " - "(known firmware bug.) Ignoring.\n"); - - return 1; -} - -static irqreturn_t cciss_intx_discard_completions(int irq, void *dev_id) -{ - ctlr_info_t *h = dev_id; - unsigned long flags; - u32 raw_tag; - - if (ignore_bogus_interrupt(h)) - return IRQ_NONE; - - if (interrupt_not_for_us(h)) - return IRQ_NONE; - spin_lock_irqsave(&h->lock, flags); - while (interrupt_pending(h)) { - raw_tag = get_next_completion(h); - while (raw_tag != FIFO_EMPTY) - raw_tag = next_command(h); - } - spin_unlock_irqrestore(&h->lock, flags); - return IRQ_HANDLED; -} - -static irqreturn_t cciss_msix_discard_completions(int irq, void *dev_id) -{ - ctlr_info_t *h = dev_id; - unsigned long flags; - u32 raw_tag; - - if (ignore_bogus_interrupt(h)) - return IRQ_NONE; - - spin_lock_irqsave(&h->lock, flags); - raw_tag = get_next_completion(h); - while (raw_tag != FIFO_EMPTY) - raw_tag = next_command(h); - spin_unlock_irqrestore(&h->lock, flags); - return IRQ_HANDLED; -} - -static irqreturn_t do_cciss_intx(int irq, void *dev_id) -{ - ctlr_info_t *h = dev_id; - unsigned long flags; - u32 raw_tag; - - if (interrupt_not_for_us(h)) - return IRQ_NONE; - spin_lock_irqsave(&h->lock, flags); - while (interrupt_pending(h)) { - raw_tag = get_next_completion(h); - while (raw_tag != FIFO_EMPTY) { - if (cciss_tag_contains_index(raw_tag)) - raw_tag = process_indexed_cmd(h, raw_tag); - else - raw_tag = process_nonindexed_cmd(h, raw_tag); - } - } - spin_unlock_irqrestore(&h->lock, flags); - return IRQ_HANDLED; -} - -/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never - * check the interrupt pending register because it is not set. - */ -static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id) -{ - ctlr_info_t *h = dev_id; - unsigned long flags; - u32 raw_tag; - - spin_lock_irqsave(&h->lock, flags); - raw_tag = get_next_completion(h); - while (raw_tag != FIFO_EMPTY) { - if (cciss_tag_contains_index(raw_tag)) - raw_tag = process_indexed_cmd(h, raw_tag); - else - raw_tag = process_nonindexed_cmd(h, raw_tag); - } - spin_unlock_irqrestore(&h->lock, flags); - return IRQ_HANDLED; -} - -/** - * add_to_scan_list() - add controller to rescan queue - * @h: Pointer to the controller. - * - * Adds the controller to the rescan queue if not already on the queue. - * - * returns 1 if added to the queue, 0 if skipped (could be on the - * queue already, or the controller could be initializing or shutting - * down). - **/ -static int add_to_scan_list(struct ctlr_info *h) -{ - struct ctlr_info *test_h; - int found = 0; - int ret = 0; - - if (h->busy_initializing) - return 0; - - if (!mutex_trylock(&h->busy_shutting_down)) - return 0; - - mutex_lock(&scan_mutex); - list_for_each_entry(test_h, &scan_q, scan_list) { - if (test_h == h) { - found = 1; - break; - } - } - if (!found && !h->busy_scanning) { - reinit_completion(&h->scan_wait); - list_add_tail(&h->scan_list, &scan_q); - ret = 1; - } - mutex_unlock(&scan_mutex); - mutex_unlock(&h->busy_shutting_down); - - return ret; -} - -/** - * remove_from_scan_list() - remove controller from rescan queue - * @h: Pointer to the controller. - * - * Removes the controller from the rescan queue if present. Blocks if - * the controller is currently conducting a rescan. The controller - * can be in one of three states: - * 1. Doesn't need a scan - * 2. On the scan list, but not scanning yet (we remove it) - * 3. Busy scanning (and not on the list). In this case we want to wait for - * the scan to complete to make sure the scanning thread for this - * controller is completely idle. - **/ -static void remove_from_scan_list(struct ctlr_info *h) -{ - struct ctlr_info *test_h, *tmp_h; - - mutex_lock(&scan_mutex); - list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) { - if (test_h == h) { /* state 2. */ - list_del(&h->scan_list); - complete_all(&h->scan_wait); - mutex_unlock(&scan_mutex); - return; - } - } - if (h->busy_scanning) { /* state 3. */ - mutex_unlock(&scan_mutex); - wait_for_completion(&h->scan_wait); - } else { /* state 1, nothing to do. */ - mutex_unlock(&scan_mutex); - } -} - -/** - * scan_thread() - kernel thread used to rescan controllers - * @data: Ignored. - * - * A kernel thread used scan for drive topology changes on - * controllers. The thread processes only one controller at a time - * using a queue. Controllers are added to the queue using - * add_to_scan_list() and removed from the queue either after done - * processing or using remove_from_scan_list(). - * - * returns 0. - **/ -static int scan_thread(void *data) -{ - struct ctlr_info *h; - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - schedule(); - if (kthread_should_stop()) - break; - - while (1) { - mutex_lock(&scan_mutex); - if (list_empty(&scan_q)) { - mutex_unlock(&scan_mutex); - break; - } - - h = list_entry(scan_q.next, - struct ctlr_info, - scan_list); - list_del(&h->scan_list); - h->busy_scanning = 1; - mutex_unlock(&scan_mutex); - - rebuild_lun_table(h, 0, 0); - complete_all(&h->scan_wait); - mutex_lock(&scan_mutex); - h->busy_scanning = 0; - mutex_unlock(&scan_mutex); - } - } - - return 0; -} - -static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c) -{ - if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) - return 0; - - switch (c->err_info->SenseInfo[12]) { - case STATE_CHANGED: - dev_warn(&h->pdev->dev, "a state change " - "detected, command retried\n"); - return 1; - break; - case LUN_FAILED: - dev_warn(&h->pdev->dev, "LUN failure " - "detected, action required\n"); - return 1; - break; - case REPORT_LUNS_CHANGED: - dev_warn(&h->pdev->dev, "report LUN data changed\n"); - /* - * Here, we could call add_to_scan_list and wake up the scan thread, - * except that it's quite likely that we will get more than one - * REPORT_LUNS_CHANGED condition in quick succession, which means - * that those which occur after the first one will likely happen - * *during* the scan_thread's rescan. And the rescan code is not - * robust enough to restart in the middle, undoing what it has already - * done, and it's not clear that it's even possible to do this, since - * part of what it does is notify the block layer, which starts - * doing it's own i/o to read partition tables and so on, and the - * driver doesn't have visibility to know what might need undoing. - * In any event, if possible, it is horribly complicated to get right - * so we just don't do it for now. - * - * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012. - */ - return 1; - break; - case POWER_OR_RESET: - dev_warn(&h->pdev->dev, - "a power on or device reset detected\n"); - return 1; - break; - case UNIT_ATTENTION_CLEARED: - dev_warn(&h->pdev->dev, - "unit attention cleared by another initiator\n"); - return 1; - break; - default: - dev_warn(&h->pdev->dev, "unknown unit attention detected\n"); - return 1; - } -} - -/* - * We cannot read the structure directly, for portability we must use - * the io functions. - * This is for debug only. - */ -static void print_cfg_table(ctlr_info_t *h) -{ - int i; - char temp_name[17]; - CfgTable_struct *tb = h->cfgtable; - - dev_dbg(&h->pdev->dev, "Controller Configuration information\n"); - dev_dbg(&h->pdev->dev, "------------------------------------\n"); - for (i = 0; i < 4; i++) - temp_name[i] = readb(&(tb->Signature[i])); - temp_name[4] = '\0'; - dev_dbg(&h->pdev->dev, " Signature = %s\n", temp_name); - dev_dbg(&h->pdev->dev, " Spec Number = %d\n", - readl(&(tb->SpecValence))); - dev_dbg(&h->pdev->dev, " Transport methods supported = 0x%x\n", - readl(&(tb->TransportSupport))); - dev_dbg(&h->pdev->dev, " Transport methods active = 0x%x\n", - readl(&(tb->TransportActive))); - dev_dbg(&h->pdev->dev, " Requested transport Method = 0x%x\n", - readl(&(tb->HostWrite.TransportRequest))); - dev_dbg(&h->pdev->dev, " Coalesce Interrupt Delay = 0x%x\n", - readl(&(tb->HostWrite.CoalIntDelay))); - dev_dbg(&h->pdev->dev, " Coalesce Interrupt Count = 0x%x\n", - readl(&(tb->HostWrite.CoalIntCount))); - dev_dbg(&h->pdev->dev, " Max outstanding commands = 0x%x\n", - readl(&(tb->CmdsOutMax))); - dev_dbg(&h->pdev->dev, " Bus Types = 0x%x\n", - readl(&(tb->BusTypes))); - for (i = 0; i < 16; i++) - temp_name[i] = readb(&(tb->ServerName[i])); - temp_name[16] = '\0'; - dev_dbg(&h->pdev->dev, " Server Name = %s\n", temp_name); - dev_dbg(&h->pdev->dev, " Heartbeat Counter = 0x%x\n\n\n", - readl(&(tb->HeartBeat))); -} - -static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) -{ - int i, offset, mem_type, bar_type; - if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ - return 0; - offset = 0; - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; - if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) - offset += 4; - else { - mem_type = pci_resource_flags(pdev, i) & - PCI_BASE_ADDRESS_MEM_TYPE_MASK; - switch (mem_type) { - case PCI_BASE_ADDRESS_MEM_TYPE_32: - case PCI_BASE_ADDRESS_MEM_TYPE_1M: - offset += 4; /* 32 bit */ - break; - case PCI_BASE_ADDRESS_MEM_TYPE_64: - offset += 8; - break; - default: /* reserved in PCI 2.2 */ - dev_warn(&pdev->dev, - "Base address is invalid\n"); - return -1; - break; - } - } - if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) - return i + 1; - } - return -1; -} - -/* Fill in bucket_map[], given nsgs (the max number of - * scatter gather elements supported) and bucket[], - * which is an array of 8 integers. The bucket[] array - * contains 8 different DMA transfer sizes (in 16 - * byte increments) which the controller uses to fetch - * commands. This function fills in bucket_map[], which - * maps a given number of scatter gather elements to one of - * the 8 DMA transfer sizes. The point of it is to allow the - * controller to only do as much DMA as needed to fetch the - * command, with the DMA transfer size encoded in the lower - * bits of the command address. - */ -static void calc_bucket_map(int bucket[], int num_buckets, - int nsgs, int *bucket_map) -{ - int i, j, b, size; - - /* even a command with 0 SGs requires 4 blocks */ -#define MINIMUM_TRANSFER_BLOCKS 4 -#define NUM_BUCKETS 8 - /* Note, bucket_map must have nsgs+1 entries. */ - for (i = 0; i <= nsgs; i++) { - /* Compute size of a command with i SG entries */ - size = i + MINIMUM_TRANSFER_BLOCKS; - b = num_buckets; /* Assume the biggest bucket */ - /* Find the bucket that is just big enough */ - for (j = 0; j < 8; j++) { - if (bucket[j] >= size) { - b = j; - break; - } - } - /* for a command with i SG entries, use bucket b. */ - bucket_map[i] = b; - } -} - -static void cciss_wait_for_mode_change_ack(ctlr_info_t *h) -{ - int i; - - /* under certain very rare conditions, this can take awhile. - * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right - * as we enter this code.) */ - for (i = 0; i < MAX_CONFIG_WAIT; i++) { - if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq)) - break; - usleep_range(10000, 20000); - } -} - -static void cciss_enter_performant_mode(ctlr_info_t *h, u32 use_short_tags) -{ - /* This is a bit complicated. There are 8 registers on - * the controller which we write to to tell it 8 different - * sizes of commands which there may be. It's a way of - * reducing the DMA done to fetch each command. Encoded into - * each command's tag are 3 bits which communicate to the controller - * which of the eight sizes that command fits within. The size of - * each command depends on how many scatter gather entries there are. - * Each SG entry requires 16 bytes. The eight registers are programmed - * with the number of 16-byte blocks a command of that size requires. - * The smallest command possible requires 5 such 16 byte blocks. - * the largest command possible requires MAXSGENTRIES + 4 16-byte - * blocks. Note, this only extends to the SG entries contained - * within the command block, and does not extend to chained blocks - * of SG elements. bft[] contains the eight values we write to - * the registers. They are not evenly distributed, but have more - * sizes for small commands, and fewer sizes for larger commands. - */ - __u32 trans_offset; - int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4}; - /* - * 5 = 1 s/g entry or 4k - * 6 = 2 s/g entry or 8k - * 8 = 4 s/g entry or 16k - * 10 = 6 s/g entry or 24k - */ - unsigned long register_value; - BUILD_BUG_ON(28 > MAXSGENTRIES + 4); - - h->reply_pool_wraparound = 1; /* spec: init to 1 */ - - /* Controller spec: zero out this buffer. */ - memset(h->reply_pool, 0, h->max_commands * sizeof(__u64)); - h->reply_pool_head = h->reply_pool; - - trans_offset = readl(&(h->cfgtable->TransMethodOffset)); - calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries, - h->blockFetchTable); - writel(bft[0], &h->transtable->BlockFetch0); - writel(bft[1], &h->transtable->BlockFetch1); - writel(bft[2], &h->transtable->BlockFetch2); - writel(bft[3], &h->transtable->BlockFetch3); - writel(bft[4], &h->transtable->BlockFetch4); - writel(bft[5], &h->transtable->BlockFetch5); - writel(bft[6], &h->transtable->BlockFetch6); - writel(bft[7], &h->transtable->BlockFetch7); - - /* size of controller ring buffer */ - writel(h->max_commands, &h->transtable->RepQSize); - writel(1, &h->transtable->RepQCount); - writel(0, &h->transtable->RepQCtrAddrLow32); - writel(0, &h->transtable->RepQCtrAddrHigh32); - writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32); - writel(0, &h->transtable->RepQAddr0High32); - writel(CFGTBL_Trans_Performant | use_short_tags, - &(h->cfgtable->HostWrite.TransportRequest)); - - writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); - cciss_wait_for_mode_change_ack(h); - register_value = readl(&(h->cfgtable->TransportActive)); - if (!(register_value & CFGTBL_Trans_Performant)) - dev_warn(&h->pdev->dev, "cciss: unable to get board into" - " performant mode\n"); -} - -static void cciss_put_controller_into_performant_mode(ctlr_info_t *h) -{ - __u32 trans_support; - - if (cciss_simple_mode) - return; - - dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n"); - /* Attempt to put controller into performant mode if supported */ - /* Does board support performant mode? */ - trans_support = readl(&(h->cfgtable->TransportSupport)); - if (!(trans_support & PERFORMANT_MODE)) - return; - - dev_dbg(&h->pdev->dev, "Placing controller into performant mode\n"); - /* Performant mode demands commands on a 32 byte boundary - * pci_alloc_consistent aligns on page boundarys already. - * Just need to check if divisible by 32 - */ - if ((sizeof(CommandList_struct) % 32) != 0) { - dev_warn(&h->pdev->dev, "%s %d %s\n", - "cciss info: command size[", - (int)sizeof(CommandList_struct), - "] not divisible by 32, no performant mode..\n"); - return; - } - - /* Performant mode ring buffer and supporting data structures */ - h->reply_pool = (__u64 *)pci_alloc_consistent( - h->pdev, h->max_commands * sizeof(__u64), - &(h->reply_pool_dhandle)); - - /* Need a block fetch table for performant mode */ - h->blockFetchTable = kmalloc(((h->maxsgentries+1) * - sizeof(__u32)), GFP_KERNEL); - - if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL)) - goto clean_up; - - cciss_enter_performant_mode(h, - trans_support & CFGTBL_Trans_use_short_tags); - - /* Change the access methods to the performant access methods */ - h->access = SA5_performant_access; - h->transMethod = CFGTBL_Trans_Performant; - - return; -clean_up: - kfree(h->blockFetchTable); - if (h->reply_pool) - pci_free_consistent(h->pdev, - h->max_commands * sizeof(__u64), - h->reply_pool, - h->reply_pool_dhandle); - return; - -} /* cciss_put_controller_into_performant_mode */ - -/* If MSI/MSI-X is supported by the kernel we will try to enable it on - * controllers that are capable. If not, we use IO-APIC mode. - */ - -static void cciss_interrupt_mode(ctlr_info_t *h) -{ - int ret; - - /* Some boards advertise MSI but don't really support it */ - if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) || - (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11)) - goto default_int_mode; - - ret = pci_alloc_irq_vectors(h->pdev, 4, 4, PCI_IRQ_MSIX); - if (ret >= 0) { - h->intr[0] = pci_irq_vector(h->pdev, 0); - h->intr[1] = pci_irq_vector(h->pdev, 1); - h->intr[2] = pci_irq_vector(h->pdev, 2); - h->intr[3] = pci_irq_vector(h->pdev, 3); - return; - } - - ret = pci_alloc_irq_vectors(h->pdev, 1, 1, PCI_IRQ_MSI); - -default_int_mode: - /* if we get here we're going to use the default interrupt mode */ - h->intr[h->intr_mode] = pci_irq_vector(h->pdev, 0); - return; -} - -static int cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id) -{ - int i; - u32 subsystem_vendor_id, subsystem_device_id; - - subsystem_vendor_id = pdev->subsystem_vendor; - subsystem_device_id = pdev->subsystem_device; - *board_id = ((subsystem_device_id << 16) & 0xffff0000) | - subsystem_vendor_id; - - for (i = 0; i < ARRAY_SIZE(products); i++) { - /* Stand aside for hpsa driver on request */ - if (cciss_allow_hpsa) - return -ENODEV; - if (*board_id == products[i].board_id) - return i; - } - dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n", - *board_id); - return -ENODEV; -} - -static inline bool cciss_board_disabled(ctlr_info_t *h) -{ - u16 command; - - (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command); - return ((command & PCI_COMMAND_MEMORY) == 0); -} - -static int cciss_pci_find_memory_BAR(struct pci_dev *pdev, - unsigned long *memory_bar) -{ - int i; - - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) - if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) { - /* addressing mode bits already removed */ - *memory_bar = pci_resource_start(pdev, i); - dev_dbg(&pdev->dev, "memory BAR = %lx\n", - *memory_bar); - return 0; - } - dev_warn(&pdev->dev, "no memory BAR found\n"); - return -ENODEV; -} - -static int cciss_wait_for_board_state(struct pci_dev *pdev, - void __iomem *vaddr, int wait_for_ready) -#define BOARD_READY 1 -#define BOARD_NOT_READY 0 -{ - int i, iterations; - u32 scratchpad; - - if (wait_for_ready) - iterations = CCISS_BOARD_READY_ITERATIONS; - else - iterations = CCISS_BOARD_NOT_READY_ITERATIONS; - - for (i = 0; i < iterations; i++) { - scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET); - if (wait_for_ready) { - if (scratchpad == CCISS_FIRMWARE_READY) - return 0; - } else { - if (scratchpad != CCISS_FIRMWARE_READY) - return 0; - } - msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS); - } - dev_warn(&pdev->dev, "board not ready, timed out.\n"); - return -ENODEV; -} - -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) -{ - *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET); - *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET); - *cfg_base_addr &= (u32) 0x0000ffff; - *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr); - if (*cfg_base_addr_index == -1) { - dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, " - "*cfg_base_addr = 0x%08x\n", *cfg_base_addr); - return -ENODEV; - } - return 0; -} - -static int cciss_find_cfgtables(ctlr_info_t *h) -{ - u64 cfg_offset; - u32 cfg_base_addr; - u64 cfg_base_addr_index; - u32 trans_offset; - int rc; - - rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr, - &cfg_base_addr_index, &cfg_offset); - if (rc) - return rc; - h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev, - cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable)); - if (!h->cfgtable) - return -ENOMEM; - rc = write_driver_ver_to_cfgtable(h->cfgtable); - if (rc) - return rc; - /* Find performant mode table. */ - trans_offset = readl(&h->cfgtable->TransMethodOffset); - h->transtable = remap_pci_mem(pci_resource_start(h->pdev, - cfg_base_addr_index)+cfg_offset+trans_offset, - sizeof(*h->transtable)); - if (!h->transtable) - return -ENOMEM; - return 0; -} - -static void cciss_get_max_perf_mode_cmds(struct ctlr_info *h) -{ - h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands)); - - /* Limit commands in memory limited kdump scenario. */ - if (reset_devices && h->max_commands > 32) - h->max_commands = 32; - - if (h->max_commands < 16) { - dev_warn(&h->pdev->dev, "Controller reports " - "max supported commands of %d, an obvious lie. " - "Using 16. Ensure that firmware is up to date.\n", - h->max_commands); - h->max_commands = 16; - } -} - -/* Interrogate the hardware for some limits: - * max commands, max SG elements without chaining, and with chaining, - * SG chain block size, etc. - */ -static void cciss_find_board_params(ctlr_info_t *h) -{ - cciss_get_max_perf_mode_cmds(h); - h->nr_cmds = h->max_commands - 4 - cciss_tape_cmds; - h->maxsgentries = readl(&(h->cfgtable->MaxSGElements)); - /* - * The P600 may exhibit poor performnace under some workloads - * if we use the value in the configuration table. Limit this - * controller to MAXSGENTRIES (32) instead. - */ - if (h->board_id == 0x3225103C) - h->maxsgentries = MAXSGENTRIES; - /* - * Limit in-command s/g elements to 32 save dma'able memory. - * Howvever spec says if 0, use 31 - */ - h->max_cmd_sgentries = 31; - if (h->maxsgentries > 512) { - h->max_cmd_sgentries = 32; - h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1; - h->maxsgentries--; /* save one for chain pointer */ - } else { - h->maxsgentries = 31; /* default to traditional values */ - h->chainsize = 0; - } -} - -static inline bool CISS_signature_present(ctlr_info_t *h) -{ - if (!check_signature(h->cfgtable->Signature, "CISS", 4)) { - dev_warn(&h->pdev->dev, "not a valid CISS config table\n"); - return false; - } - return true; -} - -/* Need to enable prefetch in the SCSI core for 6400 in x86 */ -static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h) -{ -#ifdef CONFIG_X86 - u32 prefetch; - - prefetch = readl(&(h->cfgtable->SCSI_Prefetch)); - prefetch |= 0x100; - writel(prefetch, &(h->cfgtable->SCSI_Prefetch)); -#endif -} - -/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result - * in a prefetch beyond physical memory. - */ -static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h) -{ - u32 dma_prefetch; - __u32 dma_refetch; - - if (h->board_id != 0x3225103C) - return; - dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG); - dma_prefetch |= 0x8000; - writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG); - pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch); - dma_refetch |= 0x1; - pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch); -} - -static int cciss_pci_init(ctlr_info_t *h) -{ - int prod_index, err; - - prod_index = cciss_lookup_board_id(h->pdev, &h->board_id); - if (prod_index < 0) - return -ENODEV; - h->product_name = products[prod_index].product_name; - h->access = *(products[prod_index].access); - - if (cciss_board_disabled(h)) { - dev_warn(&h->pdev->dev, "controller appears to be disabled\n"); - return -ENODEV; - } - - pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S | - PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM); - - err = pci_enable_device(h->pdev); - if (err) { - dev_warn(&h->pdev->dev, "Unable to Enable PCI device\n"); - return err; - } - - err = pci_request_regions(h->pdev, "cciss"); - if (err) { - dev_warn(&h->pdev->dev, - "Cannot obtain PCI resources, aborting\n"); - return err; - } - - dev_dbg(&h->pdev->dev, "irq = %x\n", h->pdev->irq); - dev_dbg(&h->pdev->dev, "board_id = %x\n", h->board_id); - -/* If the kernel supports MSI/MSI-X we will try to enable that functionality, - * else we use the IO-APIC interrupt assigned to us by system ROM. - */ - cciss_interrupt_mode(h); - err = cciss_pci_find_memory_BAR(h->pdev, &h->paddr); - if (err) - goto err_out_free_res; - h->vaddr = remap_pci_mem(h->paddr, 0x250); - if (!h->vaddr) { - err = -ENOMEM; - goto err_out_free_res; - } - err = cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY); - if (err) - goto err_out_free_res; - err = cciss_find_cfgtables(h); - if (err) - goto err_out_free_res; - print_cfg_table(h); - cciss_find_board_params(h); - - if (!CISS_signature_present(h)) { - err = -ENODEV; - goto err_out_free_res; - } - cciss_enable_scsi_prefetch(h); - cciss_p600_dma_prefetch_quirk(h); - err = cciss_enter_simple_mode(h); - if (err) - goto err_out_free_res; - cciss_put_controller_into_performant_mode(h); - return 0; - -err_out_free_res: - /* - * Deliberately omit pci_disable_device(): it does something nasty to - * Smart Array controllers that pci_enable_device does not undo - */ - if (h->transtable) - iounmap(h->transtable); - if (h->cfgtable) - iounmap(h->cfgtable); - if (h->vaddr) - iounmap(h->vaddr); - pci_release_regions(h->pdev); - return err; -} - -/* Function to find the first free pointer into our hba[] array - * Returns -1 if no free entries are left. - */ -static int alloc_cciss_hba(struct pci_dev *pdev) -{ - int i; - - for (i = 0; i < MAX_CTLR; i++) { - if (!hba[i]) { - ctlr_info_t *h; - - h = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL); - if (!h) - goto Enomem; - hba[i] = h; - return i; - } - } - dev_warn(&pdev->dev, "This driver supports a maximum" - " of %d controllers.\n", MAX_CTLR); - return -1; -Enomem: - dev_warn(&pdev->dev, "out of memory.\n"); - return -1; -} - -static void free_hba(ctlr_info_t *h) -{ - int i; - - hba[h->ctlr] = NULL; - for (i = 0; i < h->highest_lun + 1; i++) - if (h->gendisk[i] != NULL) - put_disk(h->gendisk[i]); - kfree(h); -} - -/* Send a message CDB to the firmware. */ -static int cciss_message(struct pci_dev *pdev, unsigned char opcode, - unsigned char type) -{ - typedef struct { - CommandListHeader_struct CommandHeader; - RequestBlock_struct Request; - ErrDescriptor_struct ErrorDescriptor; - } Command; - static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); - Command *cmd; - dma_addr_t paddr64; - uint32_t paddr32, tag; - void __iomem *vaddr; - int i, err; - - vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); - if (vaddr == NULL) - return -ENOMEM; - - /* The Inbound Post Queue only accepts 32-bit physical addresses for the - CCISS commands, so they must be allocated from the lower 4GiB of - memory. */ - err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); - if (err) { - iounmap(vaddr); - return -ENOMEM; - } - - cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); - if (cmd == NULL) { - iounmap(vaddr); - return -ENOMEM; - } - - /* This must fit, because of the 32-bit consistent DMA mask. Also, - although there's no guarantee, we assume that the address is at - least 4-byte aligned (most likely, it's page-aligned). */ - paddr32 = paddr64; - - cmd->CommandHeader.ReplyQueue = 0; - cmd->CommandHeader.SGList = 0; - cmd->CommandHeader.SGTotal = 0; - cmd->CommandHeader.Tag.lower = paddr32; - cmd->CommandHeader.Tag.upper = 0; - memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); - - cmd->Request.CDBLen = 16; - cmd->Request.Type.Type = TYPE_MSG; - cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; - cmd->Request.Type.Direction = XFER_NONE; - cmd->Request.Timeout = 0; /* Don't time out */ - cmd->Request.CDB[0] = opcode; - cmd->Request.CDB[1] = type; - memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ - - cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); - cmd->ErrorDescriptor.Addr.upper = 0; - cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); - - writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); - - for (i = 0; i < 10; i++) { - tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); - if ((tag & ~3) == paddr32) - break; - msleep(CCISS_POST_RESET_NOOP_TIMEOUT_MSECS); - } - - iounmap(vaddr); - - /* we leak the DMA buffer here ... no choice since the controller could - still complete the command. */ - if (i == 10) { - dev_err(&pdev->dev, - "controller message %02x:%02x timed out\n", - opcode, type); - return -ETIMEDOUT; - } - - pci_free_consistent(pdev, cmd_sz, cmd, paddr64); - - if (tag & 2) { - dev_err(&pdev->dev, "controller message %02x:%02x failed\n", - opcode, type); - return -EIO; - } - - dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n", - opcode, type); - return 0; -} - -#define cciss_noop(p) cciss_message(p, 3, 0) - -static int cciss_controller_hard_reset(struct pci_dev *pdev, - void * __iomem vaddr, u32 use_doorbell) -{ - u16 pmcsr; - int pos; - - if (use_doorbell) { - /* For everything after the P600, the PCI power state method - * of resetting the controller doesn't work, so we have this - * other way using the doorbell register. - */ - dev_info(&pdev->dev, "using doorbell to reset controller\n"); - writel(use_doorbell, vaddr + SA5_DOORBELL); - } else { /* Try to do it the PCI power state way */ - - /* Quoting from the Open CISS Specification: "The Power - * Management Control/Status Register (CSR) controls the power - * state of the device. The normal operating state is D0, - * CSR=00h. The software off state is D3, CSR=03h. To reset - * the controller, place the interface device in D3 then to D0, - * this causes a secondary PCI reset which will reset the - * controller." */ - - pos = pci_find_capability(pdev, PCI_CAP_ID_PM); - if (pos == 0) { - dev_err(&pdev->dev, - "cciss_controller_hard_reset: " - "PCI PM not supported\n"); - return -ENODEV; - } - dev_info(&pdev->dev, "using PCI PM to reset controller\n"); - /* enter the D3hot power management state */ - pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); - pmcsr &= ~PCI_PM_CTRL_STATE_MASK; - pmcsr |= PCI_D3hot; - pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); - - msleep(500); - - /* enter the D0 power management state */ - pmcsr &= ~PCI_PM_CTRL_STATE_MASK; - pmcsr |= PCI_D0; - pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); - - /* - * The P600 requires a small delay when changing states. - * Otherwise we may think the board did not reset and we bail. - * This for kdump only and is particular to the P600. - */ - msleep(500); - } - return 0; -} - -static void init_driver_version(char *driver_version, int len) -{ - memset(driver_version, 0, len); - strncpy(driver_version, "cciss " DRIVER_NAME, len - 1); -} - -static int write_driver_ver_to_cfgtable(CfgTable_struct __iomem *cfgtable) -{ - char *driver_version; - int i, size = sizeof(cfgtable->driver_version); - - driver_version = kmalloc(size, GFP_KERNEL); - if (!driver_version) - return -ENOMEM; - - init_driver_version(driver_version, size); - for (i = 0; i < size; i++) - writeb(driver_version[i], &cfgtable->driver_version[i]); - kfree(driver_version); - return 0; -} - -static void read_driver_ver_from_cfgtable(CfgTable_struct __iomem *cfgtable, - unsigned char *driver_ver) -{ - int i; - - for (i = 0; i < sizeof(cfgtable->driver_version); i++) - driver_ver[i] = readb(&cfgtable->driver_version[i]); -} - -static int controller_reset_failed(CfgTable_struct __iomem *cfgtable) -{ - - char *driver_ver, *old_driver_ver; - int rc, size = sizeof(cfgtable->driver_version); - - old_driver_ver = kmalloc(2 * size, GFP_KERNEL); - if (!old_driver_ver) - return -ENOMEM; - driver_ver = old_driver_ver + size; - - /* After a reset, the 32 bytes of "driver version" in the cfgtable - * should have been changed, otherwise we know the reset failed. - */ - init_driver_version(old_driver_ver, size); - read_driver_ver_from_cfgtable(cfgtable, driver_ver); - rc = !memcmp(driver_ver, old_driver_ver, size); - kfree(old_driver_ver); - return rc; -} - -/* This does a hard reset of the controller using PCI power management - * states or using the doorbell register. */ -static int cciss_kdump_hard_reset_controller(struct pci_dev *pdev) -{ - u64 cfg_offset; - u32 cfg_base_addr; - u64 cfg_base_addr_index; - void __iomem *vaddr; - unsigned long paddr; - u32 misc_fw_support; - int rc; - CfgTable_struct __iomem *cfgtable; - u32 use_doorbell; - u32 board_id; - u16 command_register; - - /* For controllers as old a the p600, this is very nearly - * the same thing as - * - * pci_save_state(pci_dev); - * pci_set_power_state(pci_dev, PCI_D3hot); - * pci_set_power_state(pci_dev, PCI_D0); - * pci_restore_state(pci_dev); - * - * For controllers newer than the P600, the pci power state - * method of resetting doesn't work so we have another way - * using the doorbell register. - */ - - /* Exclude 640x boards. These are two pci devices in one slot - * which share a battery backed cache module. One controls the - * cache, the other accesses the cache through the one that controls - * it. If we reset the one controlling the cache, the other will - * likely not be happy. Just forbid resetting this conjoined mess. - */ - cciss_lookup_board_id(pdev, &board_id); - if (!ctlr_is_resettable(board_id)) { - dev_warn(&pdev->dev, "Controller not resettable\n"); - return -ENODEV; - } - - /* if controller is soft- but not hard resettable... */ - if (!ctlr_is_hard_resettable(board_id)) - return -ENOTSUPP; /* try soft reset later. */ - - /* Save the PCI command register */ - pci_read_config_word(pdev, 4, &command_register); - /* Turn the board off. This is so that later pci_restore_state() - * won't turn the board on before the rest of config space is ready. - */ - pci_disable_device(pdev); - pci_save_state(pdev); - - /* find the first memory BAR, so we can find the cfg table */ - rc = cciss_pci_find_memory_BAR(pdev, &paddr); - if (rc) - return rc; - vaddr = remap_pci_mem(paddr, 0x250); - if (!vaddr) - return -ENOMEM; - - /* find cfgtable in order to check if reset via doorbell is supported */ - rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr, - &cfg_base_addr_index, &cfg_offset); - if (rc) - goto unmap_vaddr; - cfgtable = remap_pci_mem(pci_resource_start(pdev, - cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable)); - if (!cfgtable) { - rc = -ENOMEM; - goto unmap_vaddr; - } - rc = write_driver_ver_to_cfgtable(cfgtable); - if (rc) - goto unmap_vaddr; - - /* If reset via doorbell register is supported, use that. - * There are two such methods. Favor the newest method. - */ - misc_fw_support = readl(&cfgtable->misc_fw_support); - use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2; - if (use_doorbell) { - use_doorbell = DOORBELL_CTLR_RESET2; - } else { - use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET; - if (use_doorbell) { - dev_warn(&pdev->dev, "Controller claims that " - "'Bit 2 doorbell reset' is " - "supported, but not 'bit 5 doorbell reset'. " - "Firmware update is recommended.\n"); - rc = -ENOTSUPP; /* use the soft reset */ - goto unmap_cfgtable; - } - } - - rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell); - if (rc) - goto unmap_cfgtable; - pci_restore_state(pdev); - rc = pci_enable_device(pdev); - if (rc) { - dev_warn(&pdev->dev, "failed to enable device.\n"); - goto unmap_cfgtable; - } - pci_write_config_word(pdev, 4, command_register); - - /* Some devices (notably the HP Smart Array 5i Controller) - need a little pause here */ - msleep(CCISS_POST_RESET_PAUSE_MSECS); - - /* Wait for board to become not ready, then ready. */ - dev_info(&pdev->dev, "Waiting for board to reset.\n"); - rc = cciss_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY); - if (rc) { - dev_warn(&pdev->dev, "Failed waiting for board to hard reset." - " Will try soft reset.\n"); - rc = -ENOTSUPP; /* Not expected, but try soft reset later */ - goto unmap_cfgtable; - } - rc = cciss_wait_for_board_state(pdev, vaddr, BOARD_READY); - if (rc) { - dev_warn(&pdev->dev, - "failed waiting for board to become ready " - "after hard reset\n"); - goto unmap_cfgtable; - } - - rc = controller_reset_failed(vaddr); - if (rc < 0) - goto unmap_cfgtable; - if (rc) { - dev_warn(&pdev->dev, "Unable to successfully hard reset " - "controller. Will try soft reset.\n"); - rc = -ENOTSUPP; /* Not expected, but try soft reset later */ - } else { - dev_info(&pdev->dev, "Board ready after hard reset.\n"); - } - -unmap_cfgtable: - iounmap(cfgtable); - -unmap_vaddr: - iounmap(vaddr); - return rc; -} - -static int cciss_init_reset_devices(struct pci_dev *pdev) -{ - int rc, i; - - if (!reset_devices) - return 0; - - /* Reset the controller with a PCI power-cycle or via doorbell */ - rc = cciss_kdump_hard_reset_controller(pdev); - - /* -ENOTSUPP here means we cannot reset the controller - * but it's already (and still) up and running in - * "performant mode". Or, it might be 640x, which can't reset - * due to concerns about shared bbwc between 6402/6404 pair. - */ - if (rc == -ENOTSUPP) - return rc; /* just try to do the kdump anyhow. */ - if (rc) - return -ENODEV; - - /* Now try to get the controller to respond to a no-op */ - dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n"); - for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) { - if (cciss_noop(pdev) == 0) - break; - else - dev_warn(&pdev->dev, "no-op failed%s\n", - (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ? - "; re-trying" : "")); - msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS); - } - return 0; -} - -static int cciss_allocate_cmd_pool(ctlr_info_t *h) -{ - h->cmd_pool_bits = kmalloc(BITS_TO_LONGS(h->nr_cmds) * - sizeof(unsigned long), GFP_KERNEL); - h->cmd_pool = pci_alloc_consistent(h->pdev, - h->nr_cmds * sizeof(CommandList_struct), - &(h->cmd_pool_dhandle)); - h->errinfo_pool = pci_alloc_consistent(h->pdev, - h->nr_cmds * sizeof(ErrorInfo_struct), - &(h->errinfo_pool_dhandle)); - if ((h->cmd_pool_bits == NULL) - || (h->cmd_pool == NULL) - || (h->errinfo_pool == NULL)) { - dev_err(&h->pdev->dev, "out of memory"); - return -ENOMEM; - } - return 0; -} - -static int cciss_allocate_scatterlists(ctlr_info_t *h) -{ - int i; - - /* zero it, so that on free we need not know how many were alloc'ed */ - h->scatter_list = kzalloc(h->max_commands * - sizeof(struct scatterlist *), GFP_KERNEL); - if (!h->scatter_list) - return -ENOMEM; - - for (i = 0; i < h->nr_cmds; i++) { - h->scatter_list[i] = kmalloc(sizeof(struct scatterlist) * - h->maxsgentries, GFP_KERNEL); - if (h->scatter_list[i] == NULL) { - dev_err(&h->pdev->dev, "could not allocate " - "s/g lists\n"); - return -ENOMEM; - } - } - return 0; -} - -static void cciss_free_scatterlists(ctlr_info_t *h) -{ - int i; - - if (h->scatter_list) { - for (i = 0; i < h->nr_cmds; i++) - kfree(h->scatter_list[i]); - kfree(h->scatter_list); - } -} - -static void cciss_free_cmd_pool(ctlr_info_t *h) -{ - kfree(h->cmd_pool_bits); - if (h->cmd_pool) - pci_free_consistent(h->pdev, - h->nr_cmds * sizeof(CommandList_struct), - h->cmd_pool, h->cmd_pool_dhandle); - if (h->errinfo_pool) - pci_free_consistent(h->pdev, - h->nr_cmds * sizeof(ErrorInfo_struct), - h->errinfo_pool, h->errinfo_pool_dhandle); -} - -static int cciss_request_irq(ctlr_info_t *h, - irqreturn_t (*msixhandler)(int, void *), - irqreturn_t (*intxhandler)(int, void *)) -{ - if (h->pdev->msi_enabled || h->pdev->msix_enabled) { - if (!request_irq(h->intr[h->intr_mode], msixhandler, - 0, h->devname, h)) - return 0; - dev_err(&h->pdev->dev, "Unable to get msi irq %d" - " for %s\n", h->intr[h->intr_mode], - h->devname); - return -1; - } - - if (!request_irq(h->intr[h->intr_mode], intxhandler, - IRQF_SHARED, h->devname, h)) - return 0; - dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n", - h->intr[h->intr_mode], h->devname); - return -1; -} - -static int cciss_kdump_soft_reset(ctlr_info_t *h) -{ - if (cciss_send_reset(h, CTLR_LUNID, CCISS_RESET_TYPE_CONTROLLER)) { - dev_warn(&h->pdev->dev, "Resetting array controller failed.\n"); - return -EIO; - } - - dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n"); - if (cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) { - dev_warn(&h->pdev->dev, "Soft reset had no effect.\n"); - return -1; - } - - dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n"); - if (cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) { - dev_warn(&h->pdev->dev, "Board failed to become ready " - "after soft reset.\n"); - return -1; - } - - return 0; -} - -static void cciss_undo_allocations_after_kdump_soft_reset(ctlr_info_t *h) -{ - int ctlr = h->ctlr; - - free_irq(h->intr[h->intr_mode], h); - pci_free_irq_vectors(h->pdev); - cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds); - cciss_free_scatterlists(h); - cciss_free_cmd_pool(h); - kfree(h->blockFetchTable); - if (h->reply_pool) - pci_free_consistent(h->pdev, h->max_commands * sizeof(__u64), - h->reply_pool, h->reply_pool_dhandle); - if (h->transtable) - iounmap(h->transtable); - if (h->cfgtable) - iounmap(h->cfgtable); - if (h->vaddr) - iounmap(h->vaddr); - unregister_blkdev(h->major, h->devname); - cciss_destroy_hba_sysfs_entry(h); - pci_release_regions(h->pdev); - kfree(h); - hba[ctlr] = NULL; -} - -/* - * This is it. Find all the controllers and register them. I really hate - * stealing all these major device numbers. - * returns the number of block devices registered. - */ -static int cciss_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - int i; - int j = 0; - int rc; - int try_soft_reset = 0; - int dac, return_code; - InquiryData_struct *inq_buff; - ctlr_info_t *h; - unsigned long flags; - - /* - * By default the cciss driver is used for all older HP Smart Array - * controllers. There are module paramaters that allow a user to - * override this behavior and instead use the hpsa SCSI driver. If - * this is the case cciss may be loaded first from the kdump initrd - * image and cause a kernel panic. So if reset_devices is true and - * cciss_allow_hpsa is set just bail. - */ - if ((reset_devices) && (cciss_allow_hpsa == 1)) - return -ENODEV; - rc = cciss_init_reset_devices(pdev); - if (rc) { - if (rc != -ENOTSUPP) - return rc; - /* If the reset fails in a particular way (it has no way to do - * a proper hard reset, so returns -ENOTSUPP) we can try to do - * a soft reset once we get the controller configured up to the - * point that it can accept a command. - */ - try_soft_reset = 1; - rc = 0; - } - -reinit_after_soft_reset: - - i = alloc_cciss_hba(pdev); - if (i < 0) - return -ENOMEM; - - h = hba[i]; - h->pdev = pdev; - h->busy_initializing = 1; - h->intr_mode = cciss_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT; - INIT_LIST_HEAD(&h->cmpQ); - INIT_LIST_HEAD(&h->reqQ); - mutex_init(&h->busy_shutting_down); - - if (cciss_pci_init(h) != 0) - goto clean_no_release_regions; - - sprintf(h->devname, "cciss%d", i); - h->ctlr = i; - - if (cciss_tape_cmds < 2) - cciss_tape_cmds = 2; - if (cciss_tape_cmds > 16) - cciss_tape_cmds = 16; - - init_completion(&h->scan_wait); - - if (cciss_create_hba_sysfs_entry(h)) - goto clean0; - - /* configure PCI DMA stuff */ - if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) - dac = 1; - else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) - dac = 0; - else { - dev_err(&h->pdev->dev, "no suitable DMA available\n"); - goto clean1; - } - - /* - * register with the major number, or get a dynamic major number - * by passing 0 as argument. This is done for greater than - * 8 controller support. - */ - if (i < MAX_CTLR_ORIG) - h->major = COMPAQ_CISS_MAJOR + i; - rc = register_blkdev(h->major, h->devname); - if (rc == -EBUSY || rc == -EINVAL) { - dev_err(&h->pdev->dev, - "Unable to get major number %d for %s " - "on hba %d\n", h->major, h->devname, i); - goto clean1; - } else { - if (i >= MAX_CTLR_ORIG) - h->major = rc; - } - - /* make sure the board interrupts are off */ - h->access.set_intr_mask(h, CCISS_INTR_OFF); - rc = cciss_request_irq(h, do_cciss_msix_intr, do_cciss_intx); - if (rc) - goto clean2; - - dev_info(&h->pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n", - h->devname, pdev->device, pci_name(pdev), - h->intr[h->intr_mode], dac ? "" : " not"); - - if (cciss_allocate_cmd_pool(h)) - goto clean4; - - if (cciss_allocate_scatterlists(h)) - goto clean4; - - h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, - h->chainsize, h->nr_cmds); - if (!h->cmd_sg_list && h->chainsize > 0) - goto clean4; - - spin_lock_init(&h->lock); - - /* Initialize the pdev driver private data. - have it point to h. */ - pci_set_drvdata(pdev, h); - /* command and error info recs zeroed out before - they are used */ - bitmap_zero(h->cmd_pool_bits, h->nr_cmds); - - h->num_luns = 0; - h->highest_lun = -1; - for (j = 0; j < CISS_MAX_LUN; j++) { - h->drv[j] = NULL; - h->gendisk[j] = NULL; - } - - /* At this point, the controller is ready to take commands. - * Now, if reset_devices and the hard reset didn't work, try - * the soft reset and see if that works. - */ - if (try_soft_reset) { - - /* This is kind of gross. We may or may not get a completion - * from the soft reset command, and if we do, then the value - * from the fifo may or may not be valid. So, we wait 10 secs - * after the reset throwing away any completions we get during - * that time. Unregister the interrupt handler and register - * fake ones to scoop up any residual completions. - */ - spin_lock_irqsave(&h->lock, flags); - h->access.set_intr_mask(h, CCISS_INTR_OFF); - spin_unlock_irqrestore(&h->lock, flags); - free_irq(h->intr[h->intr_mode], h); - rc = cciss_request_irq(h, cciss_msix_discard_completions, - cciss_intx_discard_completions); - if (rc) { - dev_warn(&h->pdev->dev, "Failed to request_irq after " - "soft reset.\n"); - goto clean4; - } - - rc = cciss_kdump_soft_reset(h); - if (rc) { - dev_warn(&h->pdev->dev, "Soft reset failed.\n"); - goto clean4; - } - - dev_info(&h->pdev->dev, "Board READY.\n"); - dev_info(&h->pdev->dev, - "Waiting for stale completions to drain.\n"); - h->access.set_intr_mask(h, CCISS_INTR_ON); - msleep(10000); - h->access.set_intr_mask(h, CCISS_INTR_OFF); - - rc = controller_reset_failed(h->cfgtable); - if (rc) - dev_info(&h->pdev->dev, - "Soft reset appears to have failed.\n"); - - /* since the controller's reset, we have to go back and re-init - * everything. Easiest to just forget what we've done and do it - * all over again. - */ - cciss_undo_allocations_after_kdump_soft_reset(h); - try_soft_reset = 0; - if (rc) - /* don't go to clean4, we already unallocated */ - return -ENODEV; - - goto reinit_after_soft_reset; - } - - cciss_scsi_setup(h); - - /* Turn the interrupts on so we can service requests */ - h->access.set_intr_mask(h, CCISS_INTR_ON); - - /* Get the firmware version */ - inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL); - if (inq_buff == NULL) { - dev_err(&h->pdev->dev, "out of memory\n"); - goto clean4; - } - - return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff, - sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD); - if (return_code == IO_OK) { - h->firm_ver[0] = inq_buff->data_byte[32]; - h->firm_ver[1] = inq_buff->data_byte[33]; - h->firm_ver[2] = inq_buff->data_byte[34]; - h->firm_ver[3] = inq_buff->data_byte[35]; - } else { /* send command failed */ - dev_warn(&h->pdev->dev, "unable to determine firmware" - " version of controller\n"); - } - kfree(inq_buff); - - cciss_procinit(h); - - h->cciss_max_sectors = 8192; - - rebuild_lun_table(h, 1, 0); - cciss_engage_scsi(h); - h->busy_initializing = 0; - return 0; - -clean4: - cciss_free_cmd_pool(h); - cciss_free_scatterlists(h); - cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds); - free_irq(h->intr[h->intr_mode], h); -clean2: - unregister_blkdev(h->major, h->devname); -clean1: - cciss_destroy_hba_sysfs_entry(h); -clean0: - pci_release_regions(pdev); -clean_no_release_regions: - h->busy_initializing = 0; - - /* - * Deliberately omit pci_disable_device(): it does something nasty to - * Smart Array controllers that pci_enable_device does not undo - */ - pci_set_drvdata(pdev, NULL); - free_hba(h); - return -ENODEV; -} - -static void cciss_shutdown(struct pci_dev *pdev) -{ - ctlr_info_t *h; - char *flush_buf; - int return_code; - - h = pci_get_drvdata(pdev); - flush_buf = kzalloc(4, GFP_KERNEL); - if (!flush_buf) { - dev_warn(&h->pdev->dev, "cache not flushed, out of memory.\n"); - return; - } - /* write all data in the battery backed cache to disk */ - return_code = sendcmd_withirq(h, CCISS_CACHE_FLUSH, flush_buf, - 4, 0, CTLR_LUNID, TYPE_CMD); - kfree(flush_buf); - if (return_code != IO_OK) - dev_warn(&h->pdev->dev, "Error flushing cache\n"); - h->access.set_intr_mask(h, CCISS_INTR_OFF); - free_irq(h->intr[h->intr_mode], h); -} - -static int cciss_enter_simple_mode(struct ctlr_info *h) -{ - u32 trans_support; - - trans_support = readl(&(h->cfgtable->TransportSupport)); - if (!(trans_support & SIMPLE_MODE)) - return -ENOTSUPP; - - h->max_commands = readl(&(h->cfgtable->CmdsOutMax)); - writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest)); - writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); - cciss_wait_for_mode_change_ack(h); - print_cfg_table(h); - if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { - dev_warn(&h->pdev->dev, "unable to get board into simple mode\n"); - return -ENODEV; - } - h->transMethod = CFGTBL_Trans_Simple; - return 0; -} - - -static void cciss_remove_one(struct pci_dev *pdev) -{ - ctlr_info_t *h; - int i, j; - - if (pci_get_drvdata(pdev) == NULL) { - dev_err(&pdev->dev, "Unable to remove device\n"); - return; - } - - h = pci_get_drvdata(pdev); - i = h->ctlr; - if (hba[i] == NULL) { - dev_err(&pdev->dev, "device appears to already be removed\n"); - return; - } - - mutex_lock(&h->busy_shutting_down); - - remove_from_scan_list(h); - remove_proc_entry(h->devname, proc_cciss); - unregister_blkdev(h->major, h->devname); - - /* remove it from the disk list */ - for (j = 0; j < CISS_MAX_LUN; j++) { - struct gendisk *disk = h->gendisk[j]; - if (disk) { - struct request_queue *q = disk->queue; - - if (disk->flags & GENHD_FL_UP) { - cciss_destroy_ld_sysfs_entry(h, j, 1); - del_gendisk(disk); - } - if (q) - blk_cleanup_queue(q); - } - } - -#ifdef CONFIG_CISS_SCSI_TAPE - cciss_unregister_scsi(h); /* unhook from SCSI subsystem */ -#endif - - cciss_shutdown(pdev); - - pci_free_irq_vectors(h->pdev); - - iounmap(h->transtable); - iounmap(h->cfgtable); - iounmap(h->vaddr); - - cciss_free_cmd_pool(h); - /* Free up sg elements */ - for (j = 0; j < h->nr_cmds; j++) - kfree(h->scatter_list[j]); - kfree(h->scatter_list); - cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds); - kfree(h->blockFetchTable); - if (h->reply_pool) - pci_free_consistent(h->pdev, h->max_commands * sizeof(__u64), - h->reply_pool, h->reply_pool_dhandle); - /* - * Deliberately omit pci_disable_device(): it does something nasty to - * Smart Array controllers that pci_enable_device does not undo - */ - pci_release_regions(pdev); - pci_set_drvdata(pdev, NULL); - cciss_destroy_hba_sysfs_entry(h); - mutex_unlock(&h->busy_shutting_down); - free_hba(h); -} - -static struct pci_driver cciss_pci_driver = { - .name = "cciss", - .probe = cciss_init_one, - .remove = cciss_remove_one, - .id_table = cciss_pci_device_id, /* id_table */ - .shutdown = cciss_shutdown, -}; - -/* - * This is it. Register the PCI driver information for the cards we control - * the OS will call our registered routines when it finds one of our cards. - */ -static int __init cciss_init(void) -{ - int err; - - /* - * The hardware requires that commands are aligned on a 64-bit - * boundary. Given that we use pci_alloc_consistent() to allocate an - * array of them, the size must be a multiple of 8 bytes. - */ - BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT); - printk(KERN_INFO DRIVER_NAME "\n"); - - err = bus_register(&cciss_bus_type); - if (err) - return err; - - /* Start the scan thread */ - cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan"); - if (IS_ERR(cciss_scan_thread)) { - err = PTR_ERR(cciss_scan_thread); - goto err_bus_unregister; - } - - /* Register for our PCI devices */ - err = pci_register_driver(&cciss_pci_driver); - if (err) - goto err_thread_stop; - - return err; - -err_thread_stop: - kthread_stop(cciss_scan_thread); -err_bus_unregister: - bus_unregister(&cciss_bus_type); - - return err; -} - -static void __exit cciss_cleanup(void) -{ - int i; - - pci_unregister_driver(&cciss_pci_driver); - /* double check that all controller entrys have been removed */ - for (i = 0; i < MAX_CTLR; i++) { - if (hba[i] != NULL) { - dev_warn(&hba[i]->pdev->dev, - "had to remove controller\n"); - cciss_remove_one(hba[i]->pdev); - } - } - kthread_stop(cciss_scan_thread); - if (proc_cciss) - remove_proc_entry("driver/cciss", NULL); - bus_unregister(&cciss_bus_type); -} - -module_init(cciss_init); -module_exit(cciss_cleanup); |