/* *    Disk Array driver for HP SA 5xxx and 6xxx Controllers *    Copyright 2000, 2006 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; either version 2 of the License, or *    (at your option) any later version. * *    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, GOOD TITLE or *    NON INFRINGEMENT.  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., 675 Mass Ave, Cambridge, MA 02139, 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/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/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> #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))#define DRIVER_NAME "HP CISS Driver (v 3.6.14)"#define DRIVER_VERSION CCISS_DRIVER_VERSION(3,6,14) /* Embedded module documentation macros - see modules.h */MODULE_AUTHOR("Hewlett-Packard Company");MODULE_DESCRIPTION("Driver for HP Controller SA5xxx SA6xxx version 3.6.14");MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"			" SA6i P600 P800 P400 P400i E200 E200i E500");MODULE_VERSION("3.6.14");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_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 *  nr_cmds = Number of commands supported by controller */static struct board_type products[] = {	{0x40700E11, "Smart Array 5300", &SA5_access, 512},	{0x40800E11, "Smart Array 5i", &SA5B_access, 512},	{0x40820E11, "Smart Array 532", &SA5B_access, 512},	{0x40830E11, "Smart Array 5312", &SA5B_access, 512},	{0x409A0E11, "Smart Array 641", &SA5_access, 512},	{0x409B0E11, "Smart Array 642", &SA5_access, 512},	{0x409C0E11, "Smart Array 6400", &SA5_access, 512},	{0x409D0E11, "Smart Array 6400 EM", &SA5_access, 512},	{0x40910E11, "Smart Array 6i", &SA5_access, 512},	{0x3225103C, "Smart Array P600", &SA5_access, 512},	{0x3223103C, "Smart Array P800", &SA5_access, 512},	{0x3234103C, "Smart Array P400", &SA5_access, 512},	{0x3235103C, "Smart Array P400i", &SA5_access, 512},	{0x3211103C, "Smart Array E200i", &SA5_access, 120},	{0x3212103C, "Smart Array E200", &SA5_access, 120},	{0x3213103C, "Smart Array E200i", &SA5_access, 120},	{0x3214103C, "Smart Array E200i", &SA5_access, 120},	{0x3215103C, "Smart Array E200i", &SA5_access, 120},	{0x3237103C, "Smart Array E500", &SA5_access, 512},	{0xFFFF103C, "Unknown Smart Array", &SA5_access, 120},}; /* 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 READ_AHEAD 	 1024#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(request_queue_t *q);static irqreturn_t do_cciss_intr(int irq, void *dev_id);static int cciss_open(struct inode *inode, struct file *filep);static int cciss_release(struct inode *inode, struct file *filep);static int cciss_ioctl(struct inode *inode, struct file *filep,		       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, struct gendisk *del_disk);static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,			   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 cciss_getgeometry(int cntl_num);static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,					   __u32);static void start_io(ctlr_info_t *h);static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,		   unsigned int use_unit_num, unsigned int log_unit,		   __u8 page_code, unsigned char *scsi3addr, int cmd_type);static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,			   unsigned int use_unit_num, unsigned int log_unit,			   __u8 page_code, int cmd_type); static void fail_all_cmds(unsigned long ctlr); #ifdef CONFIG_PROC_FSstatic int cciss_proc_get_info(char *buffer, char **start, off_t offset,			       int length, int *eof, void *data);static void cciss_procinit(int i);#elsestatic void cciss_procinit(int i){}#endif				/* CONFIG_PROC_FS */ #ifdef CONFIG_COMPATstatic long cciss_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);#endif static struct block_device_operations cciss_fops = {	.owner = THIS_MODULE,	.open = cciss_open,	.release = cciss_release,	.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(CommandList_struct **Qptr, CommandList_struct *c){	if (*Qptr == NULL) {		*Qptr = c;		c->next = c->prev = c;	} else {		c->prev = (*Qptr)->prev;		c->next = (*Qptr);		(*Qptr)->prev->next = c;		(*Qptr)->prev = c;	}} static inline CommandList_struct *removeQ(CommandList_struct **Qptr,					  CommandList_struct *c){	if (c && c->next != c) {		if (*Qptr == c)			*Qptr = c->next;		c->prev->next = c->next;		c->next->prev = c->prev;	} else {		*Qptr = NULL;	}	return c;} #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)static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",	"UNKNOWN"}; static struct proc_dir_entry *proc_cciss; static int cciss_proc_get_info(char *buffer, char **start, off_t offset,			       int length, int *eof, void *data){	off_t pos = 0;	off_t len = 0;	int size, i, ctlr;	ctlr_info_t *h = (ctlr_info_t *) data;	drive_info_struct *drv;	unsigned long flags;	sector_t vol_sz, vol_sz_frac; 	ctlr = h->ctlr; 	/* 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 -EBUSY;	}	h->busy_configuring = 1;	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags); 	size = sprintf(buffer, "%s: HP %s Controller\n"		       "Board ID: 0x%08lx\n"		       "Firmware Version: %c%c%c%c\n"		       "IRQ: %d\n"		       "Logical drives: %d\n"		       "Max sectors: %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\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->cciss_max_sectors,		       h->Qdepth, h->commands_outstanding,		       h->maxQsinceinit, h->max_outstanding, h->maxSG); 	pos += size;	len += size;	cciss_proc_tape_report(ctlr, buffer, &pos, &len);	for (i = 0; i <= h->highest_lun; i++) { 		drv = &h->drv[i];		if (drv->heads == 0)			continue; 		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;		size = sprintf(buffer + len, "cciss/c%dd%d:"			       "\t%4u.%02uGB\tRAID %s\n",			       ctlr, i, (int)vol_sz, (int)vol_sz_frac,			       raid_label[drv->raid_level]);		pos += size;		len += size;	} 	*eof = 1;	*start = buffer + offset;	len -= offset;	if (len > length)		len = length;	h->busy_configuring = 0;	return len;} static intcciss_proc_write(struct file *file, const char __user *buffer,		 unsigned long count, void *data){	unsigned char cmd[80];	int len;#ifdef CONFIG_CISS_SCSI_TAPE	ctlr_info_t *h = (ctlr_info_t *) data;	int rc;#endif 	if (count > sizeof(cmd) - 1)		return -EINVAL;	if (copy_from_user(cmd, buffer, count))		return -EFAULT;	cmd[count] = '\0';	len = strlen(cmd);	// above 3 lines ensure safety	if (len && cmd[len - 1] == '\n')		cmd[--len] = '\0';#	ifdef CONFIG_CISS_SCSI_TAPE	if (strcmp("engage scsi", cmd) == 0) {		rc = cciss_engage_scsi(h->ctlr);		if (rc != 0)			return -rc;		return count;	}	/* might be nice to have "disengage" too, but it's not	   safely possible. (only 1 module use count, lock issues.) */#	endif	return -EINVAL;} /* * Get us a file in /proc/cciss that says something about each controller. * Create /proc/cciss if it doesn't exist yet. */static void __devinit cciss_procinit(int i){	struct proc_dir_entry *pde; 	if (proc_cciss == NULL) {		proc_cciss = proc_mkdir("cciss", proc_root_driver);		if (!proc_cciss)			return;	} 	pde = create_proc_read_entry(hba[i]->devname,				     S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH,				     proc_cciss, cciss_proc_get_info, hba[i]);	pde->write_proc = cciss_proc_write;}#endif				/* CONFIG_PROC_FS */ /* * 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;	} 	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 inode *inode, struct file *filep){	ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);	drive_info_struct *drv = get_drv(inode->i_bdev->bd_disk); #ifdef CCISS_DEBUG	printk(KERN_DEBUG "cciss_open %s\n", inode->i_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 (iminor(inode) != 0) {	/* not node 0? */			/* if not node 0 make sure it is a partition = 0 */			if (iminor(inode) & 0x0f) {

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