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cciss.c
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/*
* 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 [email protected]
*
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.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/hdreg.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <linux/blktrace_api.h>
#include <asm/uaccess.h>
#include <asm/io.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 <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 3.6.20)"
#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
/* Embedded module documentation macros - see modules.h */
MODULE_AUTHOR("Hewlett-Packard Company");
MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
" SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
" Smart Array G2 Series SAS/SATA Controllers");
MODULE_VERSION("3.6.20");
MODULE_LICENSE("GPL");
#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},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
{PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
{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},
{0x3241103C, "Smart Array P212", &SA5_access},
{0x3243103C, "Smart Array P410", &SA5_access},
{0x3245103C, "Smart Array P410i", &SA5_access},
{0x3247103C, "Smart Array P411", &SA5_access},
{0x3249103C, "Smart Array P812", &SA5_access},
{0x324A103C, "Smart Array P712m", &SA5_access},
{0x324B103C, "Smart Array P711m", &SA5_access},
{0xFFFF103C, "Unknown Smart Array", &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 void do_cciss_request(struct request_queue *q);
static irqreturn_t do_cciss_intr(int irq, void *dev_id);
static int cciss_open(struct block_device *bdev, fmode_t mode);
static int 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);
static int deregister_disk(ctlr_info_t *h, int drv_index,
int clear_all);
static void cciss_read_capacity(int ctlr, int logvol, int withirq,
sector_t *total_size, unsigned int *block_size);
static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
sector_t *total_size, unsigned int *block_size);
static void cciss_geometry_inquiry(int ctlr, int logvol,
int withirq, sector_t total_size,
unsigned int block_size, InquiryData_struct *inq_buff,
drive_info_struct *drv);
static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
__u32);
static void start_io(ctlr_info_t *h);
static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
__u8 page_code, unsigned char *scsi3addr, int cmd_type);
static int sendcmd_withirq(__u8 cmd, int ctlr, 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 void fail_all_cmds(unsigned long ctlr);
static int scan_thread(void *data);
static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
#ifdef CONFIG_PROC_FS
static void cciss_procinit(int i);
#else
static void cciss_procinit(int i)
{
}
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_COMPAT
static int cciss_compat_ioctl(struct block_device *, fmode_t,
unsigned, unsigned long);
#endif
static struct block_device_operations cciss_fops = {
.owner = THIS_MODULE,
.open = cciss_open,
.release = cciss_release,
.locked_ioctl = cciss_ioctl,
.getgeo = cciss_getgeo,
#ifdef CONFIG_COMPAT
.compat_ioctl = cciss_compat_ioctl,
#endif
.revalidate_disk = cciss_revalidate,
};
/*
* Enqueuing and dequeuing functions for cmdlists.
*/
static inline void addQ(struct hlist_head *list, CommandList_struct *c)
{
hlist_add_head(&c->list, list);
}
static inline void removeQ(CommandList_struct *c)
{
if (WARN_ON(hlist_unhashed(&c->list)))
return;
hlist_del_init(&c->list);
}
#include "cciss_scsi.c" /* For SCSI tape support */
#define RAID_UNKNOWN 6
#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 const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
"UNKNOWN"
};
static struct proc_dir_entry *proc_cciss;
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[SIMPLE_MODE_INT],
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->ctlr);
#endif /* CONFIG_CISS_SCSI_TAPE */
}
static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
{
ctlr_info_t *h = seq->private;
unsigned ctlr = h->ctlr;
unsigned long flags;
/* prevent displaying bogus info during configuration
* or deconfiguration of a logical volume
*/
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
if (h->busy_configuring) {
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
return ERR_PTR(-EBUSY);
}
h->busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(ctlr), 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->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 > 5)
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 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(inode)->data;
return ret;
}
static ssize_t
cciss_proc_write(struct file *file, const char __user *buf,
size_t length, loff_t *ppos)
{
int err;
char *buffer;
#ifndef CONFIG_CISS_SCSI_TAPE
return -EINVAL;
#endif
if (!buf || length > PAGE_SIZE - 1)
return -EINVAL;
buffer = (char *)__get_free_page(GFP_KERNEL);
if (!buffer)
return -ENOMEM;
err = -EFAULT;
if (copy_from_user(buffer, buf, length))
goto out;
buffer[length] = '\0';
#ifdef CONFIG_CISS_SCSI_TAPE
if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
struct seq_file *seq = file->private_data;
ctlr_info_t *h = seq->private;
int rc;
rc = cciss_engage_scsi(h->ctlr);
if (rc != 0)
err = -rc;
else
err = length;
} else
#endif /* CONFIG_CISS_SCSI_TAPE */
err = -EINVAL;
/* might be nice to have "disengage" too, but it's not
safely possible. (only 1 module use count, lock issues.) */
out:
free_page((unsigned long)buffer);
return err;
}
static 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 __devinit cciss_procinit(int i)
{
struct proc_dir_entry *pde;
if (proc_cciss == NULL)
proc_cciss = proc_mkdir("driver/cciss", NULL);
if (!proc_cciss)
return;
pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
S_IROTH, proc_cciss,
&cciss_proc_fops, hba[i]);
}
#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)
static struct device_type cciss_host_type = {
.name = "cciss_host",
};
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(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(sn, drv->serial_no, sizeof(sn));
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), 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]);
}
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(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
}
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(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(model, drv->model, MODEL_LEN + 1);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
}
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(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(rev, drv->rev, REV_LEN + 1);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
}
DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
static struct attribute *cciss_dev_attrs[] = {
&dev_attr_unique_id.attr,
&dev_attr_model.attr,
&dev_attr_vendor.attr,
&dev_attr_rev.attr,
NULL
};
static struct attribute_group cciss_dev_attr_group = {
.attrs = cciss_dev_attrs,
};
static 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,
};
static struct bus_type cciss_bus_type = {
.name = "cciss",
};
/*
* 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);
}
/*
* 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 int cciss_create_ld_sysfs_entry(struct ctlr_info *h,
drive_info_struct *drv,
int drv_index)
{
device_initialize(&drv->dev);
drv->dev.type = &cciss_dev_type;
drv->dev.bus = &cciss_bus_type;
dev_set_name(&drv->dev, "c%dd%d", h->ctlr, drv_index);
drv->dev.parent = &h->dev;
return device_add(&drv->dev);
}
/*
* Remove sysfs entries for a logical drive.
*/
static void cciss_destroy_ld_sysfs_entry(drive_info_struct *drv)
{
device_del(&drv->dev);
}
/*
* 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. For operations that can wait for kmalloc
* to possible sleep, this routine can be called with get_from_pool set to 0.
* cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
*/
static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
{
CommandList_struct *c;
int i;
u64bit temp64;
dma_addr_t cmd_dma_handle, err_dma_handle;
if (!get_from_pool) {
c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
sizeof(CommandList_struct), &cmd_dma_handle);
if (c == NULL)
return NULL;
memset(c, 0, sizeof(CommandList_struct));
c->cmdindex = -1;
c->err_info = (ErrorInfo_struct *)
pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
&err_dma_handle);
if (c->err_info == NULL) {
pci_free_consistent(h->pdev,
sizeof(CommandList_struct), c, cmd_dma_handle);
return NULL;
}
memset(c->err_info, 0, sizeof(ErrorInfo_struct));
} else { /* get it out of the controllers pool */
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 & (BITS_PER_LONG - 1),
h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
#endif
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_HLIST_NODE(&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;
}
/*
* Frees a command block that was previously allocated with cmd_alloc().
*/
static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
{
int i;
u64bit temp64;
if (!got_from_pool) {
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) c->busaddr);
} else {
i = c - h->cmd_pool;
clear_bit(i & (BITS_PER_LONG - 1),
h->cmd_pool_bits + (i / BITS_PER_LONG));
h->nr_frees++;
}
}
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 *host = get_host(bdev->bd_disk);
drive_info_struct *drv = get_drv(bdev->bd_disk);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
#endif /* CCISS_DEBUG */
if (host->busy_initializing || 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 (drv->LunID == 0) {
return -ENXIO;
}
}
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
}
drv->usage_count++;
host->usage_count++;
return 0;
}
/*
* Close. Sync first.
*/
static int cciss_release(struct gendisk *disk, fmode_t mode)
{
ctlr_info_t *host = get_host(disk);
drive_info_struct *drv = get_drv(disk);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
#endif /* CCISS_DEBUG */
drv->usage_count--;
host->usage_count--;
return 0;
}
#ifdef CONFIG_COMPAT
static int do_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
int ret;
lock_kernel();
ret = cciss_ioctl(bdev, mode, cmd, arg);
unlock_kernel();
return ret;
}
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 do_ioctl(bdev, mode, cmd, arg);
case CCISS_PASSTHRU32:
return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
case CCISS_BIG_PASSTHRU32:
return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
default:
return -ENOIOCTLCMD;
}
}
static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
IOCTL32_Command_struct __user *arg32 =
(IOCTL32_Command_struct __user *) arg;
IOCTL_Command_struct arg64;
IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
int err;
u32 cp;
err = 0;
err |=
copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
sizeof(arg64.LUN_info));
err |=
copy_from_user(&arg64.Request, &arg32->Request,
sizeof(arg64.Request));
err |=
copy_from_user(&arg64.error_info, &arg32->error_info,
sizeof(arg64.error_info));
err |= get_user(arg64.buf_size, &arg32->buf_size);
err |= get_user(cp, &arg32->buf);
arg64.buf = compat_ptr(cp);
err |= copy_to_user(p, &arg64, sizeof(arg64));
if (err)
return -EFAULT;
err = do_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;
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 = do_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 *host, CommandList_struct *c)
{
if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
(void)check_for_unit_attention(host, c);
}
/*
* ioctl
*/
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 *host = get_host(disk);
drive_info_struct *drv = get_drv(disk);
int ctlr = host->ctlr;
void __user *argp = (void __user *)arg;
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
#endif /* CCISS_DEBUG */
switch (cmd) {
case CCISS_GETPCIINFO:
{
cciss_pci_info_struct pciinfo;
if (!arg)
return -EINVAL;
pciinfo.domain = pci_domain_nr(host->pdev->bus);
pciinfo.bus = host->pdev->bus->number;
pciinfo.dev_fn = host->pdev->devfn;
pciinfo.board_id = host->board_id;
if (copy_to_user
(argp, &pciinfo, sizeof(cciss_pci_info_struct)))
return -EFAULT;
return 0;
}
case CCISS_GETINTINFO:
{
cciss_coalint_struct intinfo;
if (!arg)
return -EINVAL;
intinfo.delay =
readl(&host->cfgtable->HostWrite.CoalIntDelay);
intinfo.count =
readl(&host->cfgtable->HostWrite.CoalIntCount);
if (copy_to_user
(argp, &intinfo, sizeof(cciss_coalint_struct)))
return -EFAULT;
return 0;
}
case CCISS_SETINTINFO:
{
cciss_coalint_struct intinfo;
unsigned long flags;
int i;
if (!arg)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user
(&intinfo, argp, sizeof(cciss_coalint_struct)))
return -EFAULT;
if ((intinfo.delay == 0) && (intinfo.count == 0))
{
// printk("cciss_ioctl: delay and count cannot be 0\n");
return -EINVAL;
}