+++ /dev/null
-/*
- * 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);
+++ /dev/null
-/*
- * Disk Array driver for HP Smart Array controllers, SCSI Tape module.
- * (C) Copyright 2001, 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 300, Boston, MA
- * 02111-1307, USA.
- *
- * Questions/Comments/Bugfixes to iss_storagedev@hp.com
- *
- * Author: Stephen M. Cameron
- */
-#ifdef CONFIG_CISS_SCSI_TAPE
-
-/* Here we have code to present the driver as a scsi driver
- as it is simultaneously presented as a block driver. The
- reason for doing this is to allow access to SCSI tape drives
- through the array controller. Note in particular, neither
- physical nor logical disks are presented through the scsi layer. */
-
-#include <linux/timer.h>
-#include <linux/completion.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-
-#include <linux/atomic.h>
-
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_host.h>
-
-#include "cciss_scsi.h"
-
-#define CCISS_ABORT_MSG 0x00
-#define CCISS_RESET_MSG 0x01
-
-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);
-
-static CommandList_struct *cmd_alloc(ctlr_info_t *h);
-static CommandList_struct *cmd_special_alloc(ctlr_info_t *h);
-static void cmd_free(ctlr_info_t *h, CommandList_struct *c);
-static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c);
-
-static int cciss_scsi_write_info(struct Scsi_Host *sh,
- char *buffer, /* data buffer */
- int length); /* length of data in buffer */
-static int cciss_scsi_show_info(struct seq_file *m,
- struct Scsi_Host *sh);
-
-static int cciss_scsi_queue_command (struct Scsi_Host *h,
- struct scsi_cmnd *cmd);
-static int cciss_eh_device_reset_handler(struct scsi_cmnd *);
-static int cciss_eh_abort_handler(struct scsi_cmnd *);
-
-static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = {
- { .name = "cciss0", .ndevices = 0 },
- { .name = "cciss1", .ndevices = 0 },
- { .name = "cciss2", .ndevices = 0 },
- { .name = "cciss3", .ndevices = 0 },
- { .name = "cciss4", .ndevices = 0 },
- { .name = "cciss5", .ndevices = 0 },
- { .name = "cciss6", .ndevices = 0 },
- { .name = "cciss7", .ndevices = 0 },
-};
-
-static struct scsi_host_template cciss_driver_template = {
- .module = THIS_MODULE,
- .name = "cciss",
- .proc_name = "cciss",
- .write_info = cciss_scsi_write_info,
- .show_info = cciss_scsi_show_info,
- .queuecommand = cciss_scsi_queue_command,
- .this_id = 7,
- .use_clustering = DISABLE_CLUSTERING,
- /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */
- .eh_device_reset_handler= cciss_eh_device_reset_handler,
- .eh_abort_handler = cciss_eh_abort_handler,
-};
-
-#pragma pack(1)
-
-#define SCSI_PAD_32 8
-#define SCSI_PAD_64 8
-
-struct cciss_scsi_cmd_stack_elem_t {
- CommandList_struct cmd;
- ErrorInfo_struct Err;
- __u32 busaddr;
- int cmdindex;
- u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
-};
-
-#pragma pack()
-
-#pragma pack(1)
-struct cciss_scsi_cmd_stack_t {
- struct cciss_scsi_cmd_stack_elem_t *pool;
- struct cciss_scsi_cmd_stack_elem_t **elem;
- dma_addr_t cmd_pool_handle;
- int top;
- int nelems;
-};
-#pragma pack()
-
-struct cciss_scsi_adapter_data_t {
- struct Scsi_Host *scsi_host;
- struct cciss_scsi_cmd_stack_t cmd_stack;
- SGDescriptor_struct **cmd_sg_list;
- int registered;
- spinlock_t lock; // to protect ccissscsi[ctlr];
-};
-
-#define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \
- &h->scsi_ctlr->lock, flags);
-#define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \
- &h->scsi_ctlr->lock, flags);
-
-static CommandList_struct *
-scsi_cmd_alloc(ctlr_info_t *h)
-{
- /* assume only one process in here at a time, locking done by caller. */
- /* use h->lock */
- /* might be better to rewrite how we allocate scsi commands in a way that */
- /* needs no locking at all. */
-
- /* take the top memory chunk off the stack and return it, if any. */
- struct cciss_scsi_cmd_stack_elem_t *c;
- struct cciss_scsi_adapter_data_t *sa;
- struct cciss_scsi_cmd_stack_t *stk;
- u64bit temp64;
-
- sa = h->scsi_ctlr;
- stk = &sa->cmd_stack;
-
- if (stk->top < 0)
- return NULL;
- c = stk->elem[stk->top];
- /* memset(c, 0, sizeof(*c)); */
- memset(&c->cmd, 0, sizeof(c->cmd));
- memset(&c->Err, 0, sizeof(c->Err));
- /* set physical addr of cmd and addr of scsi parameters */
- c->cmd.busaddr = c->busaddr;
- c->cmd.cmdindex = c->cmdindex;
- /* (__u32) (stk->cmd_pool_handle +
- (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */
-
- temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct));
- /* (__u64) (stk->cmd_pool_handle +
- (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) +
- sizeof(CommandList_struct)); */
- stk->top--;
- c->cmd.ErrDesc.Addr.lower = temp64.val32.lower;
- c->cmd.ErrDesc.Addr.upper = temp64.val32.upper;
- c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct);
-
- c->cmd.ctlr = h->ctlr;
- c->cmd.err_info = &c->Err;
-
- return (CommandList_struct *) c;
-}
-
-static void
-scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
-{
- /* assume only one process in here at a time, locking done by caller. */
- /* use h->lock */
- /* drop the free memory chunk on top of the stack. */
-
- struct cciss_scsi_adapter_data_t *sa;
- struct cciss_scsi_cmd_stack_t *stk;
-
- sa = h->scsi_ctlr;
- stk = &sa->cmd_stack;
- stk->top++;
- if (stk->top >= stk->nelems) {
- dev_err(&h->pdev->dev,
- "scsi_cmd_free called too many times.\n");
- BUG();
- }
- stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
-}
-
-static int
-scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
-{
- int i;
- struct cciss_scsi_cmd_stack_t *stk;
- size_t size;
-
- stk = &sa->cmd_stack;
- stk->nelems = cciss_tape_cmds + 2;
- sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
- h->chainsize, stk->nelems);
- if (!sa->cmd_sg_list && h->chainsize > 0)
- return -ENOMEM;
-
- size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
-
- /* Check alignment, see cciss_cmd.h near CommandList_struct def. */
- BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
- /* pci_alloc_consistent guarantees 32-bit DMA address will be used */
- stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
- pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
-
- if (stk->pool == NULL) {
- cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
- sa->cmd_sg_list = NULL;
- return -ENOMEM;
- }
- stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL);
- if (!stk->elem) {
- pci_free_consistent(h->pdev, size, stk->pool,
- stk->cmd_pool_handle);
- return -1;
- }
- for (i = 0; i < stk->nelems; i++) {
- stk->elem[i] = &stk->pool[i];
- stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
- (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
- stk->elem[i]->cmdindex = i;
- }
- stk->top = stk->nelems-1;
- return 0;
-}
-
-static void
-scsi_cmd_stack_free(ctlr_info_t *h)
-{
- struct cciss_scsi_adapter_data_t *sa;
- struct cciss_scsi_cmd_stack_t *stk;
- size_t size;
-
- sa = h->scsi_ctlr;
- stk = &sa->cmd_stack;
- if (stk->top != stk->nelems-1) {
- dev_warn(&h->pdev->dev,
- "bug: %d scsi commands are still outstanding.\n",
- stk->nelems - stk->top);
- }
- size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
-
- pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
- stk->pool = NULL;
- cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
- kfree(stk->elem);
- stk->elem = NULL;
-}
-
-#if 0
-static void
-print_cmd(CommandList_struct *cp)
-{
- printk("queue:%d\n", cp->Header.ReplyQueue);
- printk("sglist:%d\n", cp->Header.SGList);
- printk("sgtot:%d\n", cp->Header.SGTotal);
- printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
- cp->Header.Tag.lower);
- printk("LUN:0x%8phN\n", cp->Header.LUN.LunAddrBytes);
- printk("CDBLen:%d\n", cp->Request.CDBLen);
- printk("Type:%d\n",cp->Request.Type.Type);
- printk("Attr:%d\n",cp->Request.Type.Attribute);
- printk(" Dir:%d\n",cp->Request.Type.Direction);
- printk("Timeout:%d\n",cp->Request.Timeout);
- printk("CDB: %16ph\n", cp->Request.CDB);
- printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n",
- cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
- cp->ErrDesc.Len);
- printk("sgs..........Errorinfo:\n");
- printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
- printk("senselen:%d\n", cp->err_info->SenseLen);
- printk("cmd status:%d\n", cp->err_info->CommandStatus);
- printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
- printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
- printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
- printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
-}
-#endif
-
-static int
-find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun)
-{
- /* finds an unused bus, target, lun for a new device */
- /* assumes h->scsi_ctlr->lock is held */
- int i, found=0;
- unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
-
- memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
-
- target_taken[SELF_SCSI_ID] = 1;
- for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++)
- target_taken[ccissscsi[h->ctlr].dev[i].target] = 1;
-
- for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) {
- if (!target_taken[i]) {
- *bus = 0; *target=i; *lun = 0; found=1;
- break;
- }
- }
- return (!found);
-}
-struct scsi2map {
- char scsi3addr[8];
- int bus, target, lun;
-};
-
-static int
-cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
- struct cciss_scsi_dev_t *device,
- struct scsi2map *added, int *nadded)
-{
- /* assumes h->scsi_ctlr->lock is held */
- int n = ccissscsi[h->ctlr].ndevices;
- struct cciss_scsi_dev_t *sd;
- int i, bus, target, lun;
- unsigned char addr1[8], addr2[8];
-
- if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
- dev_warn(&h->pdev->dev, "Too many devices, "
- "some will be inaccessible.\n");
- return -1;
- }
-
- bus = target = -1;
- lun = 0;
- /* Is this device a non-zero lun of a multi-lun device */
- /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
- if (device->scsi3addr[4] != 0) {
- /* Search through our list and find the device which */
- /* has the same 8 byte LUN address, excepting byte 4. */
- /* Assign the same bus and target for this new LUN. */
- /* Use the logical unit number from the firmware. */
- memcpy(addr1, device->scsi3addr, 8);
- addr1[4] = 0;
- for (i = 0; i < n; i++) {
- sd = &ccissscsi[h->ctlr].dev[i];
- memcpy(addr2, sd->scsi3addr, 8);
- addr2[4] = 0;
- /* differ only in byte 4? */
- if (memcmp(addr1, addr2, 8) == 0) {
- bus = sd->bus;
- target = sd->target;
- lun = device->scsi3addr[4];
- break;
- }
- }
- }
-
- sd = &ccissscsi[h->ctlr].dev[n];
- if (lun == 0) {
- if (find_bus_target_lun(h,
- &sd->bus, &sd->target, &sd->lun) != 0)
- return -1;
- } else {
- sd->bus = bus;
- sd->target = target;
- sd->lun = lun;
- }
- added[*nadded].bus = sd->bus;
- added[*nadded].target = sd->target;
- added[*nadded].lun = sd->lun;
- (*nadded)++;
-
- memcpy(sd->scsi3addr, device->scsi3addr, 8);
- memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
- memcpy(sd->revision, device->revision, sizeof(sd->revision));
- memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
- sd->devtype = device->devtype;
-
- ccissscsi[h->ctlr].ndevices++;
-
- /* initially, (before registering with scsi layer) we don't
- know our hostno and we don't want to print anything first
- time anyway (the scsi layer's inquiries will show that info) */
- if (hostno != -1)
- dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
- scsi_device_type(sd->devtype), hostno,
- sd->bus, sd->target, sd->lun);
- return 0;
-}
-
-static void
-cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry,
- struct scsi2map *removed, int *nremoved)
-{
- /* assumes h->ctlr]->scsi_ctlr->lock is held */
- int i;
- struct cciss_scsi_dev_t sd;
-
- if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
- sd = ccissscsi[h->ctlr].dev[entry];
- removed[*nremoved].bus = sd.bus;
- removed[*nremoved].target = sd.target;
- removed[*nremoved].lun = sd.lun;
- (*nremoved)++;
- for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++)
- ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1];
- ccissscsi[h->ctlr].ndevices--;
- dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
- scsi_device_type(sd.devtype), hostno,
- sd.bus, sd.target, sd.lun);
-}
-
-
-#define SCSI3ADDR_EQ(a,b) ( \
- (a)[7] == (b)[7] && \
- (a)[6] == (b)[6] && \
- (a)[5] == (b)[5] && \
- (a)[4] == (b)[4] && \
- (a)[3] == (b)[3] && \
- (a)[2] == (b)[2] && \
- (a)[1] == (b)[1] && \
- (a)[0] == (b)[0])
-
-static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr)
-{
- /* called when scsi_add_device fails in order to re-adjust */
- /* ccissscsi[] to match the mid layer's view. */
- unsigned long flags;
- int i, j;
- CPQ_TAPE_LOCK(h, flags);
- for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
- if (memcmp(scsi3addr,
- ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) {
- for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++)
- ccissscsi[h->ctlr].dev[j] =
- ccissscsi[h->ctlr].dev[j+1];
- ccissscsi[h->ctlr].ndevices--;
- break;
- }
- }
- CPQ_TAPE_UNLOCK(h, flags);
-}
-
-static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
- struct cciss_scsi_dev_t *dev2)
-{
- return dev1->devtype == dev2->devtype &&
- memcmp(dev1->scsi3addr, dev2->scsi3addr,
- sizeof(dev1->scsi3addr)) == 0 &&
- memcmp(dev1->device_id, dev2->device_id,
- sizeof(dev1->device_id)) == 0 &&
- memcmp(dev1->vendor, dev2->vendor,
- sizeof(dev1->vendor)) == 0 &&
- memcmp(dev1->model, dev2->model,
- sizeof(dev1->model)) == 0 &&
- memcmp(dev1->revision, dev2->revision,
- sizeof(dev1->revision)) == 0;
-}
-
-static int
-adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
- struct cciss_scsi_dev_t sd[], int nsds)
-{
- /* sd contains scsi3 addresses and devtypes, but
- bus target and lun are not filled in. This funciton
- takes what's in sd to be the current and adjusts
- ccissscsi[] to be in line with what's in sd. */
-
- int i,j, found, changes=0;
- struct cciss_scsi_dev_t *csd;
- unsigned long flags;
- struct scsi2map *added, *removed;
- int nadded, nremoved;
- struct Scsi_Host *sh = NULL;
-
- added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA,
- GFP_KERNEL);
- removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA,
- GFP_KERNEL);
-
- if (!added || !removed) {
- dev_warn(&h->pdev->dev,
- "Out of memory in adjust_cciss_scsi_table\n");
- goto free_and_out;
- }
-
- CPQ_TAPE_LOCK(h, flags);
-
- if (hostno != -1) /* if it's not the first time... */
- sh = h->scsi_ctlr->scsi_host;
-
- /* find any devices in ccissscsi[] that are not in
- sd[] and remove them from ccissscsi[] */
-
- i = 0;
- nremoved = 0;
- nadded = 0;
- while (i < ccissscsi[h->ctlr].ndevices) {
- csd = &ccissscsi[h->ctlr].dev[i];
- found=0;
- for (j=0;j<nsds;j++) {
- if (SCSI3ADDR_EQ(sd[j].scsi3addr,
- csd->scsi3addr)) {
- if (device_is_the_same(&sd[j], csd))
- found=2;
- else
- found=1;
- break;
- }
- }
-
- if (found == 0) { /* device no longer present. */
- changes++;
- cciss_scsi_remove_entry(h, hostno, i,
- removed, &nremoved);
- /* remove ^^^, hence i not incremented */
- } else if (found == 1) { /* device is different in some way */
- changes++;
- dev_info(&h->pdev->dev,
- "device c%db%dt%dl%d has changed.\n",
- hostno, csd->bus, csd->target, csd->lun);
- cciss_scsi_remove_entry(h, hostno, i,
- removed, &nremoved);
- /* remove ^^^, hence i not incremented */
- if (cciss_scsi_add_entry(h, hostno, &sd[j],
- added, &nadded) != 0)
- /* we just removed one, so add can't fail. */
- BUG();
- csd->devtype = sd[j].devtype;
- memcpy(csd->device_id, sd[j].device_id,
- sizeof(csd->device_id));
- memcpy(csd->vendor, sd[j].vendor,
- sizeof(csd->vendor));
- memcpy(csd->model, sd[j].model,
- sizeof(csd->model));
- memcpy(csd->revision, sd[j].revision,
- sizeof(csd->revision));
- } else /* device is same as it ever was, */
- i++; /* so just move along. */
- }
-
- /* Now, make sure every device listed in sd[] is also
- listed in ccissscsi[], adding them if they aren't found */
-
- for (i=0;i<nsds;i++) {
- found=0;
- for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
- csd = &ccissscsi[h->ctlr].dev[j];
- if (SCSI3ADDR_EQ(sd[i].scsi3addr,
- csd->scsi3addr)) {
- if (device_is_the_same(&sd[i], csd))
- found=2; /* found device */
- else
- found=1; /* found a bug. */
- break;
- }
- }
- if (!found) {
- changes++;
- if (cciss_scsi_add_entry(h, hostno, &sd[i],
- added, &nadded) != 0)
- break;
- } else if (found == 1) {
- /* should never happen... */
- changes++;
- dev_warn(&h->pdev->dev,
- "device unexpectedly changed\n");
- /* but if it does happen, we just ignore that device */
- }
- }
- CPQ_TAPE_UNLOCK(h, flags);
-
- /* Don't notify scsi mid layer of any changes the first time through */
- /* (or if there are no changes) scsi_scan_host will do it later the */
- /* first time through. */
- if (hostno == -1 || !changes)
- goto free_and_out;
-
- /* Notify scsi mid layer of any removed devices */
- for (i = 0; i < nremoved; i++) {
- struct scsi_device *sdev =
- scsi_device_lookup(sh, removed[i].bus,
- removed[i].target, removed[i].lun);
- if (sdev != NULL) {
- scsi_remove_device(sdev);
- scsi_device_put(sdev);
- } else {
- /* We don't expect to get here. */
- /* future cmds to this device will get selection */
- /* timeout as if the device was gone. */
- dev_warn(&h->pdev->dev, "didn't find "
- "c%db%dt%dl%d\n for removal.",
- hostno, removed[i].bus,
- removed[i].target, removed[i].lun);
- }
- }
-
- /* Notify scsi mid layer of any added devices */
- for (i = 0; i < nadded; i++) {
- int rc;
- rc = scsi_add_device(sh, added[i].bus,
- added[i].target, added[i].lun);
- if (rc == 0)
- continue;
- dev_warn(&h->pdev->dev, "scsi_add_device "
- "c%db%dt%dl%d failed, device not added.\n",
- hostno, added[i].bus, added[i].target, added[i].lun);
- /* now we have to remove it from ccissscsi, */
- /* since it didn't get added to scsi mid layer */
- fixup_botched_add(h, added[i].scsi3addr);
- }
-
-free_and_out:
- kfree(added);
- kfree(removed);
- return 0;
-}
-
-static int
-lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr)
-{
- int i;
- struct cciss_scsi_dev_t *sd;
- unsigned long flags;
-
- CPQ_TAPE_LOCK(h, flags);
- for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
- sd = &ccissscsi[h->ctlr].dev[i];
- if (sd->bus == bus &&
- sd->target == target &&
- sd->lun == lun) {
- memcpy(scsi3addr, &sd->scsi3addr[0], 8);
- CPQ_TAPE_UNLOCK(h, flags);
- return 0;
- }
- }
- CPQ_TAPE_UNLOCK(h, flags);
- return -1;
-}
-
-static void
-cciss_scsi_setup(ctlr_info_t *h)
-{
- struct cciss_scsi_adapter_data_t * shba;
-
- ccissscsi[h->ctlr].ndevices = 0;
- shba = kmalloc(sizeof(*shba), GFP_KERNEL);
- if (shba == NULL)
- return;
- shba->scsi_host = NULL;
- spin_lock_init(&shba->lock);
- shba->registered = 0;
- if (scsi_cmd_stack_setup(h, shba) != 0) {
- kfree(shba);
- shba = NULL;
- }
- h->scsi_ctlr = shba;
- return;
-}
-
-static void complete_scsi_command(CommandList_struct *c, int timeout,
- __u32 tag)
-{
- struct scsi_cmnd *cmd;
- ctlr_info_t *h;
- ErrorInfo_struct *ei;
-
- ei = c->err_info;
-
- /* First, see if it was a message rather than a command */
- if (c->Request.Type.Type == TYPE_MSG) {
- c->cmd_type = CMD_MSG_DONE;
- return;
- }
-
- cmd = (struct scsi_cmnd *) c->scsi_cmd;
- h = hba[c->ctlr];
-
- scsi_dma_unmap(cmd);
- if (c->Header.SGTotal > h->max_cmd_sgentries)
- cciss_unmap_sg_chain_block(h, c);
-
- cmd->result = (DID_OK << 16); /* host byte */
- cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
- /* cmd->result |= (GOOD < 1); */ /* status byte */
-
- cmd->result |= (ei->ScsiStatus);
- /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */
-
- /* copy the sense data whether we need to or not. */
-
- memcpy(cmd->sense_buffer, ei->SenseInfo,
- ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
- SCSI_SENSE_BUFFERSIZE :
- ei->SenseLen);
- scsi_set_resid(cmd, ei->ResidualCnt);
-
- if (ei->CommandStatus != 0) { /* an error has occurred */
- switch (ei->CommandStatus) {
- case CMD_TARGET_STATUS:
- /* Pass it up to the upper layers... */
- if (!ei->ScsiStatus) {
-
- /* Ordinarily, this case should never happen, but there is a bug
- in some released firmware revisions that allows it to happen
- if, for example, a 4100 backplane loses power and the tape
- drive is in it. We assume that it's a fatal error of some
- kind because we can't show that it wasn't. We will make it
- look like selection timeout since that is the most common
- reason for this to occur, and it's severe enough. */
-
- cmd->result = DID_NO_CONNECT << 16;
- }
- break;
- case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
- break;
- case CMD_DATA_OVERRUN:
- dev_warn(&h->pdev->dev, "%p has"
- " completed with data overrun "
- "reported\n", c);
- break;
- case CMD_INVALID: {
- /*
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false);
- print_cmd(c);
- */
- /* We get CMD_INVALID if you address a non-existent tape drive instead
- of a selection timeout (no response). You will see this if you yank
- out a tape drive, then try to access it. This is kind of a shame
- because it means that any other CMD_INVALID (e.g. driver bug) will
- get interpreted as a missing target. */
- cmd->result = DID_NO_CONNECT << 16;
- }
- break;
- case CMD_PROTOCOL_ERR:
- cmd->result = DID_ERROR << 16;
- dev_warn(&h->pdev->dev,
- "%p has protocol error\n", c);
- break;
- case CMD_HARDWARE_ERR:
- cmd->result = DID_ERROR << 16;
- dev_warn(&h->pdev->dev,
- "%p had hardware error\n", c);
- break;
- case CMD_CONNECTION_LOST:
- cmd->result = DID_ERROR << 16;
- dev_warn(&h->pdev->dev,
- "%p had connection lost\n", c);
- break;
- case CMD_ABORTED:
- cmd->result = DID_ABORT << 16;
- dev_warn(&h->pdev->dev, "%p was aborted\n", c);
- break;
- case CMD_ABORT_FAILED:
- cmd->result = DID_ERROR << 16;
- dev_warn(&h->pdev->dev,
- "%p reports abort failed\n", c);
- break;
- case CMD_UNSOLICITED_ABORT:
- cmd->result = DID_ABORT << 16;
- dev_warn(&h->pdev->dev, "%p aborted due to an "
- "unsolicited abort\n", c);
- break;
- case CMD_TIMEOUT:
- cmd->result = DID_TIME_OUT << 16;
- dev_warn(&h->pdev->dev, "%p timedout\n", c);
- break;
- case CMD_UNABORTABLE:
- cmd->result = DID_ERROR << 16;
- dev_warn(&h->pdev->dev, "c %p command "
- "unabortable\n", c);
- break;
- default:
- cmd->result = DID_ERROR << 16;
- dev_warn(&h->pdev->dev,
- "%p returned unknown status %x\n", c,
- ei->CommandStatus);
- }
- }
- cmd->scsi_done(cmd);
- scsi_cmd_free(h, c);
-}
-
-static int
-cciss_scsi_detect(ctlr_info_t *h)
-{
- struct Scsi_Host *sh;
- int error;
-
- sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *));
- if (sh == NULL)
- goto fail;
- sh->io_port = 0; // good enough? FIXME,
- sh->n_io_port = 0; // I don't think we use these two...
- sh->this_id = SELF_SCSI_ID;
- sh->can_queue = cciss_tape_cmds;
- sh->sg_tablesize = h->maxsgentries;
- sh->max_cmd_len = MAX_COMMAND_SIZE;
- sh->max_sectors = h->cciss_max_sectors;
-
- ((struct cciss_scsi_adapter_data_t *)
- h->scsi_ctlr)->scsi_host = sh;
- sh->hostdata[0] = (unsigned long) h;
- sh->irq = h->intr[SIMPLE_MODE_INT];
- sh->unique_id = sh->irq;
- error = scsi_add_host(sh, &h->pdev->dev);
- if (error)
- goto fail_host_put;
- scsi_scan_host(sh);
- return 1;
-
- fail_host_put:
- scsi_host_put(sh);
- fail:
- return 0;
-}
-
-static void
-cciss_unmap_one(struct pci_dev *pdev,
- CommandList_struct *c,
- size_t buflen,
- int data_direction)
-{
- u64bit addr64;
-
- addr64.val32.lower = c->SG[0].Addr.lower;
- addr64.val32.upper = c->SG[0].Addr.upper;
- pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
-}
-
-static void
-cciss_map_one(struct pci_dev *pdev,
- CommandList_struct *c,
- unsigned char *buf,
- size_t buflen,
- int data_direction)
-{
- __u64 addr64;
-
- addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
- c->SG[0].Addr.lower =
- (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
- c->SG[0].Addr.upper =
- (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
- c->SG[0].Len = buflen;
- c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */
- c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
-}
-
-static int
-cciss_scsi_do_simple_cmd(ctlr_info_t *h,
- CommandList_struct *c,
- unsigned char *scsi3addr,
- unsigned char *cdb,
- unsigned char cdblen,
- unsigned char *buf, int bufsize,
- int direction)
-{
- DECLARE_COMPLETION_ONSTACK(wait);
-
- c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */
- c->scsi_cmd = NULL;
- c->Header.ReplyQueue = 0; /* unused in simple mode */
- memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN));
- c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
- // Fill in the request block...
-
- /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n",
- scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
- scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
-
- memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
- memcpy(c->Request.CDB, cdb, cdblen);
- c->Request.Timeout = 0;
- c->Request.CDBLen = cdblen;
- c->Request.Type.Type = TYPE_CMD;
- c->Request.Type.Attribute = ATTR_SIMPLE;
- c->Request.Type.Direction = direction;
-
- /* Fill in the SG list and do dma mapping */
- cciss_map_one(h->pdev, c, (unsigned char *) buf,
- bufsize, DMA_FROM_DEVICE);
-
- c->waiting = &wait;
- enqueue_cmd_and_start_io(h, c);
- wait_for_completion(&wait);
-
- /* undo the dma mapping */
- cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE);
- return(0);
-}
-
-static void
-cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
-{
- ErrorInfo_struct *ei;
-
- ei = c->err_info;
- switch (ei->CommandStatus) {
- case CMD_TARGET_STATUS:
- dev_warn(&h->pdev->dev,
- "cmd %p has completed with errors\n", c);
- dev_warn(&h->pdev->dev,
- "cmd %p has SCSI Status = %x\n",
- c, ei->ScsiStatus);
- if (ei->ScsiStatus == 0)
- dev_warn(&h->pdev->dev,
- "SCSI status is abnormally zero. "
- "(probably indicates selection timeout "
- "reported incorrectly due to a known "
- "firmware bug, circa July, 2001.)\n");
- break;
- case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
- dev_info(&h->pdev->dev, "UNDERRUN\n");
- break;
- case CMD_DATA_OVERRUN:
- dev_warn(&h->pdev->dev, "%p has"
- " completed with data overrun "
- "reported\n", c);
- break;
- case CMD_INVALID: {
- /* controller unfortunately reports SCSI passthru's */
- /* to non-existent targets as invalid commands. */
- dev_warn(&h->pdev->dev,
- "%p is reported invalid (probably means "
- "target device no longer present)\n", c);
- /*
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false);
- print_cmd(c);
- */
- }
- break;
- case CMD_PROTOCOL_ERR:
- dev_warn(&h->pdev->dev, "%p has protocol error\n", c);
- break;
- case CMD_HARDWARE_ERR:
- /* cmd->result = DID_ERROR << 16; */
- dev_warn(&h->pdev->dev, "%p had hardware error\n", c);
- break;
- case CMD_CONNECTION_LOST:
- dev_warn(&h->pdev->dev, "%p had connection lost\n", c);
- break;
- case CMD_ABORTED:
- dev_warn(&h->pdev->dev, "%p was aborted\n", c);
- break;
- case CMD_ABORT_FAILED:
- dev_warn(&h->pdev->dev,
- "%p reports abort failed\n", c);
- break;
- case CMD_UNSOLICITED_ABORT:
- dev_warn(&h->pdev->dev,
- "%p aborted due to an unsolicited abort\n", c);
- break;
- case CMD_TIMEOUT:
- dev_warn(&h->pdev->dev, "%p timedout\n", c);
- break;
- case CMD_UNABORTABLE:
- dev_warn(&h->pdev->dev,
- "%p unabortable\n", c);
- break;
- default:
- dev_warn(&h->pdev->dev,
- "%p returned unknown status %x\n",
- c, ei->CommandStatus);
- }
-}
-
-static int
-cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
- unsigned char page, unsigned char *buf,
- unsigned char bufsize)
-{
- int rc;
- CommandList_struct *c;
- char cdb[6];
- ErrorInfo_struct *ei;
- unsigned long flags;
-
- spin_lock_irqsave(&h->lock, flags);
- c = scsi_cmd_alloc(h);
- spin_unlock_irqrestore(&h->lock, flags);
-
- if (c == NULL) { /* trouble... */
- printk("cmd_alloc returned NULL!\n");
- return -1;
- }
-
- ei = c->err_info;
-
- cdb[0] = CISS_INQUIRY;
- cdb[1] = (page != 0);
- cdb[2] = page;
- cdb[3] = 0;
- cdb[4] = bufsize;
- cdb[5] = 0;
- rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb,
- 6, buf, bufsize, XFER_READ);
-
- if (rc != 0) return rc; /* something went wrong */
-
- if (ei->CommandStatus != 0 &&
- ei->CommandStatus != CMD_DATA_UNDERRUN) {
- cciss_scsi_interpret_error(h, c);
- rc = -1;
- }
- spin_lock_irqsave(&h->lock, flags);
- scsi_cmd_free(h, c);
- spin_unlock_irqrestore(&h->lock, flags);
- return rc;
-}
-
-/* Get the device id from inquiry page 0x83 */
-static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr,
- unsigned char *device_id, int buflen)
-{
- int rc;
- unsigned char *buf;
-
- if (buflen > 16)
- buflen = 16;
- buf = kzalloc(64, GFP_KERNEL);
- if (!buf)
- return -1;
- rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
- if (rc == 0)
- memcpy(device_id, &buf[8], buflen);
- kfree(buf);
- return rc != 0;
-}
-
-static int
-cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
- ReportLunData_struct *buf, int bufsize)
-{
- int rc;
- CommandList_struct *c;
- unsigned char cdb[12];
- unsigned char scsi3addr[8];
- ErrorInfo_struct *ei;
- unsigned long flags;
-
- spin_lock_irqsave(&h->lock, flags);
- c = scsi_cmd_alloc(h);
- spin_unlock_irqrestore(&h->lock, flags);
- if (c == NULL) { /* trouble... */
- printk("cmd_alloc returned NULL!\n");
- return -1;
- }
-
- memset(&scsi3addr[0], 0, 8); /* address the controller */
- cdb[0] = CISS_REPORT_PHYS;
- cdb[1] = 0;
- cdb[2] = 0;
- cdb[3] = 0;
- cdb[4] = 0;
- cdb[5] = 0;
- cdb[6] = (bufsize >> 24) & 0xFF; //MSB
- cdb[7] = (bufsize >> 16) & 0xFF;
- cdb[8] = (bufsize >> 8) & 0xFF;
- cdb[9] = bufsize & 0xFF;
- cdb[10] = 0;
- cdb[11] = 0;
-
- rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr,
- cdb, 12,
- (unsigned char *) buf,
- bufsize, XFER_READ);
-
- if (rc != 0) return rc; /* something went wrong */
-
- ei = c->err_info;
- if (ei->CommandStatus != 0 &&
- ei->CommandStatus != CMD_DATA_UNDERRUN) {
- cciss_scsi_interpret_error(h, c);
- rc = -1;
- }
- spin_lock_irqsave(&h->lock, flags);
- scsi_cmd_free(h, c);
- spin_unlock_irqrestore(&h->lock, flags);
- return rc;
-}
-
-static void
-cciss_update_non_disk_devices(ctlr_info_t *h, int hostno)
-{
- /* the idea here is we could get notified from /proc
- that some devices have changed, so we do a report
- physical luns cmd, and adjust our list of devices
- accordingly. (We can't rely on the scsi-mid layer just
- doing inquiries, because the "busses" that the scsi
- mid-layer probes are totally fabricated by this driver,
- so new devices wouldn't show up.
-
- the scsi3addr's of devices won't change so long as the
- adapter is not reset. That means we can rescan and
- tell which devices we already know about, vs. new
- devices, vs. disappearing devices.
-
- Also, if you yank out a tape drive, then put in a disk
- in it's place, (say, a configured volume from another
- array controller for instance) _don't_ poke this driver
- (so it thinks it's still a tape, but _do_ poke the scsi
- mid layer, so it does an inquiry... the scsi mid layer
- will see the physical disk. This would be bad. Need to
- think about how to prevent that. One idea would be to
- snoop all scsi responses and if an inquiry repsonse comes
- back that reports a disk, chuck it an return selection
- timeout instead and adjust our table... Not sure i like
- that though.
-
- */
-#define OBDR_TAPE_INQ_SIZE 49
-#define OBDR_TAPE_SIG "$DR-10"
- ReportLunData_struct *ld_buff;
- unsigned char *inq_buff;
- unsigned char scsi3addr[8];
- __u32 num_luns=0;
- unsigned char *ch;
- struct cciss_scsi_dev_t *currentsd, *this_device;
- int ncurrent=0;
- int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
- int i;
-
- ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
- inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
- currentsd = kzalloc(sizeof(*currentsd) *
- (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
- if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
- printk(KERN_ERR "cciss: out of memory\n");
- goto out;
- }
- this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
- if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) {
- ch = &ld_buff->LUNListLength[0];
- num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
- if (num_luns > CISS_MAX_PHYS_LUN) {
- printk(KERN_WARNING
- "cciss: Maximum physical LUNs (%d) exceeded. "
- "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN,
- num_luns - CISS_MAX_PHYS_LUN);
- num_luns = CISS_MAX_PHYS_LUN;
- }
- }
- else {
- printk(KERN_ERR "cciss: Report physical LUNs failed.\n");
- goto out;
- }
-
-
- /* adjust our table of devices */
- for (i = 0; i < num_luns; i++) {
- /* for each physical lun, do an inquiry */
- if (ld_buff->LUN[i][3] & 0xC0) continue;
- memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
- memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
-
- if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
- (unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
- /* Inquiry failed (msg printed already) */
- continue; /* so we will skip this device. */
-
- this_device->devtype = (inq_buff[0] & 0x1f);
- this_device->bus = -1;
- this_device->target = -1;
- this_device->lun = -1;
- memcpy(this_device->scsi3addr, scsi3addr, 8);
- memcpy(this_device->vendor, &inq_buff[8],
- sizeof(this_device->vendor));
- memcpy(this_device->model, &inq_buff[16],
- sizeof(this_device->model));
- memcpy(this_device->revision, &inq_buff[32],
- sizeof(this_device->revision));
- memset(this_device->device_id, 0,
- sizeof(this_device->device_id));
- cciss_scsi_get_device_id(h, scsi3addr,
- this_device->device_id, sizeof(this_device->device_id));
-
- switch (this_device->devtype) {
- case 0x05: /* CD-ROM */ {
-
- /* We don't *really* support actual CD-ROM devices,
- * just this "One Button Disaster Recovery" tape drive
- * which temporarily pretends to be a CD-ROM drive.
- * So we check that the device is really an OBDR tape
- * device by checking for "$DR-10" in bytes 43-48 of
- * the inquiry data.
- */
- char obdr_sig[7];
-
- strncpy(obdr_sig, &inq_buff[43], 6);
- obdr_sig[6] = '\0';
- if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0)
- /* Not OBDR device, ignore it. */
- break;
- }
- /* fall through . . . */
- case 0x01: /* sequential access, (tape) */
- case 0x08: /* medium changer */
- if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
- printk(KERN_INFO "cciss%d: %s ignored, "
- "too many devices.\n", h->ctlr,
- scsi_device_type(this_device->devtype));
- break;
- }
- currentsd[ncurrent] = *this_device;
- ncurrent++;
- break;
- default:
- break;
- }
- }
-
- adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent);
-out:
- kfree(inq_buff);
- kfree(ld_buff);
- kfree(currentsd);
- return;
-}
-
-static int
-is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c
-{
- int verb_len = strlen(verb);
- if (len >= verb_len && !memcmp(verb,ptr,verb_len))
- return verb_len;
- else
- return 0;
-}
-
-static int
-cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length)
-{
- int arg_len;
-
- if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
- cciss_update_non_disk_devices(h, hostno);
- else
- return -EINVAL;
- return length;
-}
-
-static int
-cciss_scsi_write_info(struct Scsi_Host *sh,
- char *buffer, /* data buffer */
- int length) /* length of data in buffer */
-{
- ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0];
- if (h == NULL) /* This really shouldn't ever happen. */
- return -EINVAL;
-
- return cciss_scsi_user_command(h, sh->host_no,
- buffer, length);
-}
-
-static int
-cciss_scsi_show_info(struct seq_file *m, struct Scsi_Host *sh)
-{
-
- ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0];
- int i;
-
- if (h == NULL) /* This really shouldn't ever happen. */
- return -EINVAL;
-
- seq_printf(m, "cciss%d: SCSI host: %d\n",
- h->ctlr, sh->host_no);
-
- /* this information is needed by apps to know which cciss
- device corresponds to which scsi host number without
- having to open a scsi target device node. The device
- information is not a duplicate of /proc/scsi/scsi because
- the two may be out of sync due to scsi hotplug, rather
- this info is for an app to be able to use to know how to
- get them back in sync. */
-
- for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
- struct cciss_scsi_dev_t *sd =
- &ccissscsi[h->ctlr].dev[i];
- seq_printf(m, "c%db%dt%dl%d %02d "
- "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
- sh->host_no, sd->bus, sd->target, sd->lun,
- sd->devtype,
- sd->scsi3addr[0], sd->scsi3addr[1],
- sd->scsi3addr[2], sd->scsi3addr[3],
- sd->scsi3addr[4], sd->scsi3addr[5],
- sd->scsi3addr[6], sd->scsi3addr[7]);
- }
- return 0;
-}
-
-/* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
- dma mapping and fills in the scatter gather entries of the
- cciss command, c. */
-
-static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c,
- struct scsi_cmnd *cmd)
-{
- unsigned int len;
- struct scatterlist *sg;
- __u64 addr64;
- int request_nsgs, i, chained, sg_index;
- struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr;
- SGDescriptor_struct *curr_sg;
-
- BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
-
- chained = 0;
- sg_index = 0;
- curr_sg = c->SG;
- request_nsgs = scsi_dma_map(cmd);
- if (request_nsgs) {
- scsi_for_each_sg(cmd, sg, request_nsgs, i) {
- if (sg_index + 1 == h->max_cmd_sgentries &&
- !chained && request_nsgs - i > 1) {
- chained = 1;
- sg_index = 0;
- curr_sg = sa->cmd_sg_list[c->cmdindex];
- }
- addr64 = (__u64) sg_dma_address(sg);
- len = sg_dma_len(sg);
- curr_sg[sg_index].Addr.lower =
- (__u32) (addr64 & 0x0FFFFFFFFULL);
- curr_sg[sg_index].Addr.upper =
- (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
- curr_sg[sg_index].Len = len;
- curr_sg[sg_index].Ext = 0;
- ++sg_index;
- }
- if (chained)
- cciss_map_sg_chain_block(h, c,
- sa->cmd_sg_list[c->cmdindex],
- (request_nsgs - (h->max_cmd_sgentries - 1)) *
- sizeof(SGDescriptor_struct));
- }
- /* track how many SG entries we are using */
- if (request_nsgs > h->maxSG)
- h->maxSG = request_nsgs;
- c->Header.SGTotal = (u16) request_nsgs + chained;
- if (request_nsgs > h->max_cmd_sgentries)
- c->Header.SGList = h->max_cmd_sgentries;
- else
- c->Header.SGList = c->Header.SGTotal;
- return;
-}
-
-
-static int
-cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
-{
- ctlr_info_t *h;
- int rc;
- unsigned char scsi3addr[8];
- CommandList_struct *c;
- unsigned long flags;
-
- // Get the ptr to our adapter structure (hba[i]) out of cmd->host.
- // We violate cmd->host privacy here. (Is there another way?)
- h = (ctlr_info_t *) cmd->device->host->hostdata[0];
-
- rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id,
- cmd->device->lun, scsi3addr);
- if (rc != 0) {
- /* the scsi nexus does not match any that we presented... */
- /* pretend to mid layer that we got selection timeout */
- cmd->result = DID_NO_CONNECT << 16;
- done(cmd);
- /* we might want to think about registering controller itself
- as a processor device on the bus so sg binds to it. */
- return 0;
- }
-
- /* Ok, we have a reasonable scsi nexus, so send the cmd down, and
- see what the device thinks of it. */
-
- spin_lock_irqsave(&h->lock, flags);
- c = scsi_cmd_alloc(h);
- spin_unlock_irqrestore(&h->lock, flags);
- if (c == NULL) { /* trouble... */
- dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n");
- /* FIXME: next 3 lines are -> BAD! <- */
- cmd->result = DID_NO_CONNECT << 16;
- done(cmd);
- return 0;
- }
-
- // Fill in the command list header
-
- cmd->scsi_done = done; // save this for use by completion code
-
- /* save c in case we have to abort it */
- cmd->host_scribble = (unsigned char *) c;
-
- c->cmd_type = CMD_SCSI;
- c->scsi_cmd = cmd;
- c->Header.ReplyQueue = 0; /* unused in simple mode */
- memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
- c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */
-
- // Fill in the request block...
-
- c->Request.Timeout = 0;
- memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
- BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
- c->Request.CDBLen = cmd->cmd_len;
- memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
- c->Request.Type.Type = TYPE_CMD;
- c->Request.Type.Attribute = ATTR_SIMPLE;
- switch (cmd->sc_data_direction) {
- case DMA_TO_DEVICE:
- c->Request.Type.Direction = XFER_WRITE;
- break;
- case DMA_FROM_DEVICE:
- c->Request.Type.Direction = XFER_READ;
- break;
- case DMA_NONE:
- c->Request.Type.Direction = XFER_NONE;
- break;
- case DMA_BIDIRECTIONAL:
- // This can happen if a buggy application does a scsi passthru
- // and sets both inlen and outlen to non-zero. ( see
- // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
-
- c->Request.Type.Direction = XFER_RSVD;
- // This is technically wrong, and cciss controllers should
- // reject it with CMD_INVALID, which is the most correct
- // response, but non-fibre backends appear to let it
- // slide by, and give the same results as if this field
- // were set correctly. Either way is acceptable for
- // our purposes here.
-
- break;
-
- default:
- dev_warn(&h->pdev->dev, "unknown data direction: %d\n",
- cmd->sc_data_direction);
- BUG();
- break;
- }
- cciss_scatter_gather(h, c, cmd);
- enqueue_cmd_and_start_io(h, c);
- /* the cmd'll come back via intr handler in complete_scsi_command() */
- return 0;
-}
-
-static DEF_SCSI_QCMD(cciss_scsi_queue_command)
-
-static void cciss_unregister_scsi(ctlr_info_t *h)
-{
- struct cciss_scsi_adapter_data_t *sa;
- struct cciss_scsi_cmd_stack_t *stk;
- unsigned long flags;
-
- /* we are being forcibly unloaded, and may not refuse. */
-
- spin_lock_irqsave(&h->lock, flags);
- sa = h->scsi_ctlr;
- stk = &sa->cmd_stack;
-
- /* if we weren't ever actually registered, don't unregister */
- if (sa->registered) {
- spin_unlock_irqrestore(&h->lock, flags);
- scsi_remove_host(sa->scsi_host);
- scsi_host_put(sa->scsi_host);
- spin_lock_irqsave(&h->lock, flags);
- }
-
- /* set scsi_host to NULL so our detect routine will
- find us on register */
- sa->scsi_host = NULL;
- spin_unlock_irqrestore(&h->lock, flags);
- scsi_cmd_stack_free(h);
- kfree(sa);
-}
-
-static int cciss_engage_scsi(ctlr_info_t *h)
-{
- struct cciss_scsi_adapter_data_t *sa;
- struct cciss_scsi_cmd_stack_t *stk;
- unsigned long flags;
-
- spin_lock_irqsave(&h->lock, flags);
- sa = h->scsi_ctlr;
- stk = &sa->cmd_stack;
-
- if (sa->registered) {
- dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n");
- spin_unlock_irqrestore(&h->lock, flags);
- return -ENXIO;
- }
- sa->registered = 1;
- spin_unlock_irqrestore(&h->lock, flags);
- cciss_update_non_disk_devices(h, -1);
- cciss_scsi_detect(h);
- return 0;
-}
-
-static void
-cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h)
-{
- unsigned long flags;
-
- CPQ_TAPE_LOCK(h, flags);
- seq_printf(seq,
- "Sequential access devices: %d\n\n",
- ccissscsi[h->ctlr].ndevices);
- CPQ_TAPE_UNLOCK(h, flags);
-}
-
-static int wait_for_device_to_become_ready(ctlr_info_t *h,
- unsigned char lunaddr[])
-{
- int rc;
- int count = 0;
- int waittime = HZ;
- CommandList_struct *c;
-
- c = cmd_alloc(h);
- if (!c) {
- dev_warn(&h->pdev->dev, "out of memory in "
- "wait_for_device_to_become_ready.\n");
- return IO_ERROR;
- }
-
- /* Send test unit ready until device ready, or give up. */
- while (count < 20) {
-
- /* Wait for a bit. do this first, because if we send
- * the TUR right away, the reset will just abort it.
- */
- schedule_timeout_uninterruptible(waittime);
- count++;
-
- /* Increase wait time with each try, up to a point. */
- if (waittime < (HZ * 30))
- waittime = waittime * 2;
-
- /* Send the Test Unit Ready */
- rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0,
- lunaddr, TYPE_CMD);
- if (rc == 0)
- rc = sendcmd_withirq_core(h, c, 0);
-
- (void) process_sendcmd_error(h, c);
-
- if (rc != 0)
- goto retry_tur;
-
- if (c->err_info->CommandStatus == CMD_SUCCESS)
- break;
-
- if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
- c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
- if (c->err_info->SenseInfo[2] == NO_SENSE)
- break;
- if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) {
- unsigned char asc;
- asc = c->err_info->SenseInfo[12];
- check_for_unit_attention(h, c);
- if (asc == POWER_OR_RESET)
- break;
- }
- }
-retry_tur:
- dev_warn(&h->pdev->dev, "Waiting %d secs "
- "for device to become ready.\n",
- waittime / HZ);
- rc = 1; /* device not ready. */
- }
-
- if (rc)
- dev_warn(&h->pdev->dev, "giving up on device.\n");
- else
- dev_warn(&h->pdev->dev, "device is ready.\n");
-
- cmd_free(h, c);
- return rc;
-}
-
-/* Need at least one of these error handlers to keep ../scsi/hosts.c from
- * complaining. Doing a host- or bus-reset can't do anything good here.
- * Despite what it might say in scsi_error.c, there may well be commands
- * on the controller, as the cciss driver registers twice, once as a block
- * device for the logical drives, and once as a scsi device, for any tape
- * drives. So we know there are no commands out on the tape drives, but we
- * don't know there are no commands on the controller, and it is likely
- * that there probably are, as the cciss block device is most commonly used
- * as a boot device (embedded controller on HP/Compaq systems.)
-*/
-
-static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
-{
- int rc;
- CommandList_struct *cmd_in_trouble;
- unsigned char lunaddr[8];
- ctlr_info_t *h;
-
- /* find the controller to which the command to be aborted was sent */
- h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
- if (h == NULL) /* paranoia */
- return FAILED;
- dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n");
- /* find the command that's giving us trouble */
- cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
- if (cmd_in_trouble == NULL) /* paranoia */
- return FAILED;
- memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
- /* send a reset to the SCSI LUN which the command was sent to */
- rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr,
- TYPE_MSG);
- if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
- return SUCCESS;
- dev_warn(&h->pdev->dev, "resetting device failed.\n");
- return FAILED;
-}
-
-static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
-{
- int rc;
- CommandList_struct *cmd_to_abort;
- unsigned char lunaddr[8];
- ctlr_info_t *h;
-
- /* find the controller to which the command to be aborted was sent */
- h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
- if (h == NULL) /* paranoia */
- return FAILED;
- dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n");
-
- /* find the command to be aborted */
- cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
- if (cmd_to_abort == NULL) /* paranoia */
- return FAILED;
- memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
- rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag,
- 0, 0, lunaddr, TYPE_MSG);
- if (rc == 0)
- return SUCCESS;
- return FAILED;
-
-}
-
-#else /* no CONFIG_CISS_SCSI_TAPE */
-
-/* If no tape support, then these become defined out of existence */
-
-#define cciss_scsi_setup(cntl_num)
-#define cciss_engage_scsi(h)
-
-#endif /* CONFIG_CISS_SCSI_TAPE */
projects / linux-2.6-block.git / commitdiff