Release 4.7 drivers/block/cciss_scsi.c

/*
 *    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;
}

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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;
}

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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;
}

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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;
}

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#if 0
static int xmargin=8;
static int amargin=60;

static void
print_bytes (unsigned char *c, int len, int hex, int ascii)
{

        int i;
        unsigned char *x;

        if (hex)
        {
                x = c;
                for (i=0;i<len;i++)
                {
                        if ((i % xmargin) == 0 && i>0) printk("\n");
                        if ((i % xmargin) == 0) printk("0x%04x:", i);
                        printk(" %02x", *x);
                        x++;
                }
                printk("\n");
        }
        if (ascii)
        {
                x = c;
                for (i=0;i<len;i++)
                {
                        if ((i % amargin) == 0 && i>0) printk("\n");
                        if ((i % amargin) == 0) printk("0x%04x:", i);
                        if (*x > 26 && *x < 128) printk("%c", *x);
                        else printk(".");
                        x++;
                }
                printk("\n");
        }
}

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%02x%02x%02x%02x%02x%02x%02x%02x\n",
                cp->Header.LUN.LunAddrBytes[0],
                cp->Header.LUN.LunAddrBytes[1],
                cp->Header.LUN.LunAddrBytes[2],
                cp->Header.LUN.LunAddrBytes[3],
                cp->Header.LUN.LunAddrBytes[4],
                cp->Header.LUN.LunAddrBytes[5],
                cp->Header.LUN.LunAddrBytes[6],
                cp->Header.LUN.LunAddrBytes[7]);
        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: %02x %02x %02x %02x %02x %02x %02x %02x"
                " %02x %02x %02x %02x %02x %02x %02x %02x\n",
                cp->Request.CDB[0], cp->Request.CDB[1],
                cp->Request.CDB[2], cp->Request.CDB[3],
                cp->Request.CDB[4], cp->Request.CDB[5],
                cp->Request.CDB[6], cp->Request.CDB[7],
                cp->Request.CDB[8], cp->Request.CDB[9],
                cp->Request.CDB[10], cp->Request.CDB[11],
                cp->Request.CDB[12], cp->Request.CDB[13],
                cp->Request.CDB[14], cp->Request.CDB[15]),
        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);	
}
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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;
}

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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);
}


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#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);
}

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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;
}

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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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mike miller
mike miller
579
67.40%
1
20.00%
stephen m. cameron
stephen m. cameron
161
18.74%
3
60.00%
linus torvalds
linus torvalds
119
13.85%
1
20.00%
Total
859
100.00%
5
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
83
60.58%
1
33.33%
andrew morton
andrew morton
44
32.12%
1
33.33%
stephen m. cameron
stephen m. cameron
10
7.30%
1
33.33%
Total
137
100.00%
3
100.00%


static void 

cciss_scsi_setup(ctlr_info_t *h)
{
	struct cciss_scsi_adapter_data_t * shba;

	ccissscsi[h->ctlr].ndevices = 0;
	shba = (struct cciss_scsi_adapter_data_t *)
		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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
andrew morton
andrew morton
60
60.00%
1
25.00%
linus torvalds
linus torvalds
28
28.00%
1
25.00%
stephen m. cameron
stephen m. cameron
8
8.00%
1
25.00%
thomas gleixner
thomas gleixner
4
4.00%
1
25.00%
Total
100
100.00%
4
100.00%



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_bytes(c, sizeof(*c), 1, 0);
                                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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
337
67.00%
1
11.11%
stephen m. cameron
stephen m. cameron
157
31.21%
6
66.67%
fujita tomonori
fujita tomonori
5
0.99%
1
11.11%
mike miller
mike miller
4
0.80%
1
11.11%
Total
503
100.00%
9
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
100
56.18%
1
8.33%
christoph hellwig
christoph hellwig
40
22.47%
5
41.67%
stephen m. cameron
stephen m. cameron
35
19.66%
5
41.67%
mike miller
mike miller
3
1.69%
1
8.33%
Total
178
100.00%
12
100.00%


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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
71
95.95%
1
50.00%
stephen m. cameron
stephen m. cameron
3
4.05%
1
50.00%
Total
74
100.00%
2
100.00%


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 */
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
124
95.38%
1
50.00%
stephen m. cameron
stephen m. cameron
6
4.62%
1
50.00%
Total
130
100.00%
2
100.00%


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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
196
81.33%
1
14.29%
stephen m. cameron
stephen m. cameron
28
11.62%
2
28.57%
jens axboe
jens axboe
13
5.39%
1
14.29%
mike miller
mike miller
2
0.83%
1
14.29%
andrew morton
andrew morton
1
0.41%
1
14.29%
peter zijlstra
peter zijlstra
1
0.41%
1
14.29%
Total
241
100.00%
7
100.00%


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_bytes((unsigned char *) c, sizeof(*c), 1, 0);
                        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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
stephen m. cameron
stephen m. cameron
162
51.27%
3
75.00%
linus torvalds
linus torvalds
154
48.73%
1
25.00%
Total
316
100.00%
4
100.00%


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;	
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
188
80.00%
1
16.67%
stephen m. cameron
stephen m. cameron
34
14.47%
3
50.00%
mike miller
mike miller
8
3.40%
1
16.67%
james bottomley
james bottomley
5
2.13%
1
16.67%
Total
235
100.00%
6
100.00%

/* 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;
}

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stephen m. cameron
stephen m. cameron
103
100.00%
2
100.00%
Total
103
100.00%
2
100.00%


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;	
}

Contributors
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Tokens
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Commits
CommitProp
linus torvalds
linus torvalds
281
90.65%
1
25.00%
stephen m. cameron
stephen m. cameron
25
8.06%
2
50.00%
jens axboe
jens axboe
4
1.29%
1
25.00%
Total
310
100.00%
4
100.00%


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 = &currentsd[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;
}

Contributors
Person
Tokens
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CommitProp
linus torvalds
linus torvalds
305
50.16%
1
11.11%
stephen m. cameron
stephen m. cameron
193
31.74%
2
22.22%
mike miller
mike miller
67
11.02%
1
11.11%
andrew morton
andrew morton
41
6.74%
3
33.33%
eric sesterhenn
eric sesterhenn
1
0.16%
1
11.11%
matthew wilcox
matthew wilcox
1
0.16%
1
11.11%
Total
608
100.00%
9
100.00%


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;
}

Contributors
Person
Tokens
Prop
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CommitProp
linus torvalds
linus torvalds
49
100.00%
1
100.00%
Total
49
100.00%
1
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
51
92.73%
1
50.00%
stephen m. cameron
stephen m. cameron
4
7.27%
1
50.00%
Total
55
100.00%
2
100.00%


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);	
} 

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
33
55.00%
1
20.00%
al viro
al viro
19
31.67%
1
20.00%
christoph hellwig
christoph hellwig
5
8.33%
1
20.00%
stephen m. cameron
stephen m. cameron
2
3.33%
1
20.00%
adrian bunk
adrian bunk
1
1.67%
1
20.00%
Total
60
100.00%
5
100.00%


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;
}

Contributors
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CommitProp
mike miller
mike miller
118
62.77%
1
20.00%
al viro
al viro
46
24.47%
1
20.00%
linus torvalds
linus torvalds
12
6.38%
1
20.00%
stephen m. cameron
stephen m. cameron
9
4.79%
1
20.00%
christoph hellwig
christoph hellwig
3
1.60%
1
20.00%
Total
188
100.00%
5
100.00%

/* 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;
}


Contributors
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CommitProp
stephen m. cameron
stephen m. cameron
178
55.80%
3
50.00%
linus torvalds
linus torvalds
122
38.24%
1
16.67%
fujita tomonori
fujita tomonori
17
5.33%
1
16.67%
mike miller
mike miller
2
0.63%
1
16.67%
Total
319
100.00%
6
100.00%


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;
}

Contributors
Person
Tokens
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CommitProp
linus torvalds
linus torvalds
384
82.40%
1
10.00%
stephen m. cameron
stephen m. cameron
59
12.66%
3
30.00%
alan cox
alan cox
9
1.93%
1
10.00%
mike miller
mike miller
8
1.72%
1
10.00%
eric sesterhenn
eric sesterhenn
3
0.64%
1
10.00%
andrew morton
andrew morton
1
0.21%
1
10.00%
jeff garzik
jeff garzik
1
0.21%
1
10.00%
adrian bunk
adrian bunk
1
0.21%
1
10.00%
Total
466
100.00%
10
100.00%

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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
44
38.94%
1
14.29%
mike miller
mike miller
40
35.40%
2
28.57%
stephen m. cameron
stephen m. cameron
28
24.78%
3
42.86%
jeff garzik
jeff garzik
1
0.88%
1
14.29%
Total
113
100.00%
7
100.00%


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);
}

Contributors
Person
Tokens
Prop
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CommitProp
mike miller
mike miller
42
85.71%
2
66.67%
stephen m. cameron
stephen m. cameron
7
14.29%
1
33.33%
Total
49
100.00%
3
100.00%



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;
}

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stephen m. cameron
stephen m. cameron
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/* 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;
}

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mike miller
mike miller
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stephen m. cameron
stephen m. cameron
60
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4
66.67%
linus torvalds
linus torvalds
15
9.26%
1
16.67%
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162
100.00%
6
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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;

}

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mike miller
mike miller
84
57.93%
1
16.67%
stephen m. cameron
stephen m. cameron
42
28.97%
3
50.00%
linus torvalds
linus torvalds
18
12.41%
1
16.67%
christoph hellwig
christoph hellwig
1
0.69%
1
16.67%
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145
100.00%
6
100.00%

#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 */
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linus torvalds
linus torvalds
3809
46.59%
2
3.17%
stephen m. cameron
stephen m. cameron
2273
27.80%
21
33.33%
mike miller
mike miller
1607
19.66%
11
17.46%
andrew morton
andrew morton
153
1.87%
4
6.35%
christoph hellwig
christoph hellwig
101
1.24%
6
9.52%
al viro
al viro
89
1.09%
1
1.59%
art haas
art haas
32
0.39%
1
1.59%
fujita tomonori
fujita tomonori
22
0.27%
1
1.59%
jeff garzik
jeff garzik
22
0.27%
1
1.59%
jens axboe
jens axboe
17
0.21%
2
3.17%
tim schmielau
tim schmielau
11
0.13%
1
1.59%
alan cox
alan cox
9
0.11%
1
1.59%
james bottomley
james bottomley
5
0.06%
1
1.59%
dan carpenter
dan carpenter
5
0.06%
1
1.59%
adrian bunk
adrian bunk
4
0.05%
1
1.59%
eric sesterhenn
eric sesterhenn
4
0.05%
2
3.17%
thomas gleixner
thomas gleixner
4
0.05%
1
1.59%
matthew wilcox
matthew wilcox
3
0.04%
1
1.59%
dave jones
dave jones
2
0.02%
1
1.59%
grant coady
grant coady
1
0.01%
1
1.59%
peter zijlstra
peter zijlstra
1
0.01%
1
1.59%
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arun sharma
1
0.01%
1
1.59%
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8175
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63
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Directory: drivers/block

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