diff options
Diffstat (limited to 'drivers/block/cciss_scsi.c')
| -rw-r--r-- | drivers/block/cciss_scsi.c | 1653 |
1 files changed, 0 insertions, 1653 deletions
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c deleted file mode 100644 index 01a1f7e24978..000000000000 --- a/drivers/block/cciss_scsi.c +++ /dev/null @@ -1,1653 +0,0 @@ -/* - * Disk Array driver for HP Smart Array controllers, SCSI Tape module. - * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA - * 02111-1307, USA. - * - * Questions/Comments/Bugfixes to iss_storagedev@hp.com - * - * Author: Stephen M. Cameron - */ -#ifdef CONFIG_CISS_SCSI_TAPE - -/* Here we have code to present the driver as a scsi driver - as it is simultaneously presented as a block driver. The - reason for doing this is to allow access to SCSI tape drives - through the array controller. Note in particular, neither - physical nor logical disks are presented through the scsi layer. */ - -#include <linux/timer.h> -#include <linux/completion.h> -#include <linux/slab.h> -#include <linux/string.h> - -#include <linux/atomic.h> - -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_host.h> - -#include "cciss_scsi.h" - -#define CCISS_ABORT_MSG 0x00 -#define CCISS_RESET_MSG 0x01 - -static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff, - size_t size, - __u8 page_code, unsigned char *scsi3addr, - int cmd_type); - -static CommandList_struct *cmd_alloc(ctlr_info_t *h); -static CommandList_struct *cmd_special_alloc(ctlr_info_t *h); -static void cmd_free(ctlr_info_t *h, CommandList_struct *c); -static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c); - -static int cciss_scsi_write_info(struct Scsi_Host *sh, - char *buffer, /* data buffer */ - int length); /* length of data in buffer */ -static int cciss_scsi_show_info(struct seq_file *m, - struct Scsi_Host *sh); - -static int cciss_scsi_queue_command (struct Scsi_Host *h, - struct scsi_cmnd *cmd); -static int cciss_eh_device_reset_handler(struct scsi_cmnd *); -static int cciss_eh_abort_handler(struct scsi_cmnd *); - -static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = { - { .name = "cciss0", .ndevices = 0 }, - { .name = "cciss1", .ndevices = 0 }, - { .name = "cciss2", .ndevices = 0 }, - { .name = "cciss3", .ndevices = 0 }, - { .name = "cciss4", .ndevices = 0 }, - { .name = "cciss5", .ndevices = 0 }, - { .name = "cciss6", .ndevices = 0 }, - { .name = "cciss7", .ndevices = 0 }, -}; - -static struct scsi_host_template cciss_driver_template = { - .module = THIS_MODULE, - .name = "cciss", - .proc_name = "cciss", - .write_info = cciss_scsi_write_info, - .show_info = cciss_scsi_show_info, - .queuecommand = cciss_scsi_queue_command, - .this_id = 7, - .use_clustering = DISABLE_CLUSTERING, - /* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */ - .eh_device_reset_handler= cciss_eh_device_reset_handler, - .eh_abort_handler = cciss_eh_abort_handler, -}; - -#pragma pack(1) - -#define SCSI_PAD_32 8 -#define SCSI_PAD_64 8 - -struct cciss_scsi_cmd_stack_elem_t { - CommandList_struct cmd; - ErrorInfo_struct Err; - __u32 busaddr; - int cmdindex; - u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64]; -}; - -#pragma pack() - -#pragma pack(1) -struct cciss_scsi_cmd_stack_t { - struct cciss_scsi_cmd_stack_elem_t *pool; - struct cciss_scsi_cmd_stack_elem_t **elem; - dma_addr_t cmd_pool_handle; - int top; - int nelems; -}; -#pragma pack() - -struct cciss_scsi_adapter_data_t { - struct Scsi_Host *scsi_host; - struct cciss_scsi_cmd_stack_t cmd_stack; - SGDescriptor_struct **cmd_sg_list; - int registered; - spinlock_t lock; // to protect ccissscsi[ctlr]; -}; - -#define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \ - &h->scsi_ctlr->lock, flags); -#define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \ - &h->scsi_ctlr->lock, flags); - -static CommandList_struct * -scsi_cmd_alloc(ctlr_info_t *h) -{ - /* assume only one process in here at a time, locking done by caller. */ - /* use h->lock */ - /* might be better to rewrite how we allocate scsi commands in a way that */ - /* needs no locking at all. */ - - /* take the top memory chunk off the stack and return it, if any. */ - struct cciss_scsi_cmd_stack_elem_t *c; - struct cciss_scsi_adapter_data_t *sa; - struct cciss_scsi_cmd_stack_t *stk; - u64bit temp64; - - sa = h->scsi_ctlr; - stk = &sa->cmd_stack; - - if (stk->top < 0) - return NULL; - c = stk->elem[stk->top]; - /* memset(c, 0, sizeof(*c)); */ - memset(&c->cmd, 0, sizeof(c->cmd)); - memset(&c->Err, 0, sizeof(c->Err)); - /* set physical addr of cmd and addr of scsi parameters */ - c->cmd.busaddr = c->busaddr; - c->cmd.cmdindex = c->cmdindex; - /* (__u32) (stk->cmd_pool_handle + - (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */ - - temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct)); - /* (__u64) (stk->cmd_pool_handle + - (sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) + - sizeof(CommandList_struct)); */ - stk->top--; - c->cmd.ErrDesc.Addr.lower = temp64.val32.lower; - c->cmd.ErrDesc.Addr.upper = temp64.val32.upper; - c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct); - - c->cmd.ctlr = h->ctlr; - c->cmd.err_info = &c->Err; - - return (CommandList_struct *) c; -} - -static void -scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c) -{ - /* assume only one process in here at a time, locking done by caller. */ - /* use h->lock */ - /* drop the free memory chunk on top of the stack. */ - - struct cciss_scsi_adapter_data_t *sa; - struct cciss_scsi_cmd_stack_t *stk; - - sa = h->scsi_ctlr; - stk = &sa->cmd_stack; - stk->top++; - if (stk->top >= stk->nelems) { - dev_err(&h->pdev->dev, - "scsi_cmd_free called too many times.\n"); - BUG(); - } - stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c; -} - -static int -scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa) -{ - int i; - struct cciss_scsi_cmd_stack_t *stk; - size_t size; - - stk = &sa->cmd_stack; - stk->nelems = cciss_tape_cmds + 2; - sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, - h->chainsize, stk->nelems); - if (!sa->cmd_sg_list && h->chainsize > 0) - return -ENOMEM; - - size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; - - /* Check alignment, see cciss_cmd.h near CommandList_struct def. */ - BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0); - /* pci_alloc_consistent guarantees 32-bit DMA address will be used */ - stk->pool = (struct cciss_scsi_cmd_stack_elem_t *) - pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle); - - if (stk->pool == NULL) { - cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); - sa->cmd_sg_list = NULL; - return -ENOMEM; - } - stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL); - if (!stk->elem) { - pci_free_consistent(h->pdev, size, stk->pool, - stk->cmd_pool_handle); - return -1; - } - for (i = 0; i < stk->nelems; i++) { - stk->elem[i] = &stk->pool[i]; - stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + - (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i)); - stk->elem[i]->cmdindex = i; - } - stk->top = stk->nelems-1; - return 0; -} - -static void -scsi_cmd_stack_free(ctlr_info_t *h) -{ - struct cciss_scsi_adapter_data_t *sa; - struct cciss_scsi_cmd_stack_t *stk; - size_t size; - - sa = h->scsi_ctlr; - stk = &sa->cmd_stack; - if (stk->top != stk->nelems-1) { - dev_warn(&h->pdev->dev, - "bug: %d scsi commands are still outstanding.\n", - stk->nelems - stk->top); - } - size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems; - - pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle); - stk->pool = NULL; - cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems); - kfree(stk->elem); - stk->elem = NULL; -} - -#if 0 -static void -print_cmd(CommandList_struct *cp) -{ - printk("queue:%d\n", cp->Header.ReplyQueue); - printk("sglist:%d\n", cp->Header.SGList); - printk("sgtot:%d\n", cp->Header.SGTotal); - printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper, - cp->Header.Tag.lower); - printk("LUN:0x%8phN\n", cp->Header.LUN.LunAddrBytes); - printk("CDBLen:%d\n", cp->Request.CDBLen); - printk("Type:%d\n",cp->Request.Type.Type); - printk("Attr:%d\n",cp->Request.Type.Attribute); - printk(" Dir:%d\n",cp->Request.Type.Direction); - printk("Timeout:%d\n",cp->Request.Timeout); - printk("CDB: %16ph\n", cp->Request.CDB); - printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n", - cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower, - cp->ErrDesc.Len); - printk("sgs..........Errorinfo:\n"); - printk("scsistatus:%d\n", cp->err_info->ScsiStatus); - printk("senselen:%d\n", cp->err_info->SenseLen); - printk("cmd status:%d\n", cp->err_info->CommandStatus); - printk("resid cnt:%d\n", cp->err_info->ResidualCnt); - printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size); - printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num); - printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value); -} -#endif - -static int -find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun) -{ - /* finds an unused bus, target, lun for a new device */ - /* assumes h->scsi_ctlr->lock is held */ - int i, found=0; - unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA]; - - memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA); - - target_taken[SELF_SCSI_ID] = 1; - for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) - target_taken[ccissscsi[h->ctlr].dev[i].target] = 1; - - for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) { - if (!target_taken[i]) { - *bus = 0; *target=i; *lun = 0; found=1; - break; - } - } - return (!found); -} -struct scsi2map { - char scsi3addr[8]; - int bus, target, lun; -}; - -static int -cciss_scsi_add_entry(ctlr_info_t *h, int hostno, - struct cciss_scsi_dev_t *device, - struct scsi2map *added, int *nadded) -{ - /* assumes h->scsi_ctlr->lock is held */ - int n = ccissscsi[h->ctlr].ndevices; - struct cciss_scsi_dev_t *sd; - int i, bus, target, lun; - unsigned char addr1[8], addr2[8]; - - if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) { - dev_warn(&h->pdev->dev, "Too many devices, " - "some will be inaccessible.\n"); - return -1; - } - - bus = target = -1; - lun = 0; - /* Is this device a non-zero lun of a multi-lun device */ - /* byte 4 of the 8-byte LUN addr will contain the logical unit no. */ - if (device->scsi3addr[4] != 0) { - /* Search through our list and find the device which */ - /* has the same 8 byte LUN address, excepting byte 4. */ - /* Assign the same bus and target for this new LUN. */ - /* Use the logical unit number from the firmware. */ - memcpy(addr1, device->scsi3addr, 8); - addr1[4] = 0; - for (i = 0; i < n; i++) { - sd = &ccissscsi[h->ctlr].dev[i]; - memcpy(addr2, sd->scsi3addr, 8); - addr2[4] = 0; - /* differ only in byte 4? */ - if (memcmp(addr1, addr2, 8) == 0) { - bus = sd->bus; - target = sd->target; - lun = device->scsi3addr[4]; - break; - } - } - } - - sd = &ccissscsi[h->ctlr].dev[n]; - if (lun == 0) { - if (find_bus_target_lun(h, - &sd->bus, &sd->target, &sd->lun) != 0) - return -1; - } else { - sd->bus = bus; - sd->target = target; - sd->lun = lun; - } - added[*nadded].bus = sd->bus; - added[*nadded].target = sd->target; - added[*nadded].lun = sd->lun; - (*nadded)++; - - memcpy(sd->scsi3addr, device->scsi3addr, 8); - memcpy(sd->vendor, device->vendor, sizeof(sd->vendor)); - memcpy(sd->revision, device->revision, sizeof(sd->revision)); - memcpy(sd->device_id, device->device_id, sizeof(sd->device_id)); - sd->devtype = device->devtype; - - ccissscsi[h->ctlr].ndevices++; - - /* initially, (before registering with scsi layer) we don't - know our hostno and we don't want to print anything first - time anyway (the scsi layer's inquiries will show that info) */ - if (hostno != -1) - dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", - scsi_device_type(sd->devtype), hostno, - sd->bus, sd->target, sd->lun); - return 0; -} - -static void -cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry, - struct scsi2map *removed, int *nremoved) -{ - /* assumes h->ctlr]->scsi_ctlr->lock is held */ - int i; - struct cciss_scsi_dev_t sd; - - if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return; - sd = ccissscsi[h->ctlr].dev[entry]; - removed[*nremoved].bus = sd.bus; - removed[*nremoved].target = sd.target; - removed[*nremoved].lun = sd.lun; - (*nremoved)++; - for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++) - ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1]; - ccissscsi[h->ctlr].ndevices--; - dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", - scsi_device_type(sd.devtype), hostno, - sd.bus, sd.target, sd.lun); -} - - -#define SCSI3ADDR_EQ(a,b) ( \ - (a)[7] == (b)[7] && \ - (a)[6] == (b)[6] && \ - (a)[5] == (b)[5] && \ - (a)[4] == (b)[4] && \ - (a)[3] == (b)[3] && \ - (a)[2] == (b)[2] && \ - (a)[1] == (b)[1] && \ - (a)[0] == (b)[0]) - -static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr) -{ - /* called when scsi_add_device fails in order to re-adjust */ - /* ccissscsi[] to match the mid layer's view. */ - unsigned long flags; - int i, j; - CPQ_TAPE_LOCK(h, flags); - for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { - if (memcmp(scsi3addr, - ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) { - for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++) - ccissscsi[h->ctlr].dev[j] = - ccissscsi[h->ctlr].dev[j+1]; - ccissscsi[h->ctlr].ndevices--; - break; - } - } - CPQ_TAPE_UNLOCK(h, flags); -} - -static int device_is_the_same(struct cciss_scsi_dev_t *dev1, - struct cciss_scsi_dev_t *dev2) -{ - return dev1->devtype == dev2->devtype && - memcmp(dev1->scsi3addr, dev2->scsi3addr, - sizeof(dev1->scsi3addr)) == 0 && - memcmp(dev1->device_id, dev2->device_id, - sizeof(dev1->device_id)) == 0 && - memcmp(dev1->vendor, dev2->vendor, - sizeof(dev1->vendor)) == 0 && - memcmp(dev1->model, dev2->model, - sizeof(dev1->model)) == 0 && - memcmp(dev1->revision, dev2->revision, - sizeof(dev1->revision)) == 0; -} - -static int -adjust_cciss_scsi_table(ctlr_info_t *h, int hostno, - struct cciss_scsi_dev_t sd[], int nsds) -{ - /* sd contains scsi3 addresses and devtypes, but - bus target and lun are not filled in. This funciton - takes what's in sd to be the current and adjusts - ccissscsi[] to be in line with what's in sd. */ - - int i,j, found, changes=0; - struct cciss_scsi_dev_t *csd; - unsigned long flags; - struct scsi2map *added, *removed; - int nadded, nremoved; - struct Scsi_Host *sh = NULL; - - added = kzalloc(sizeof(*added) * CCISS_MAX_SCSI_DEVS_PER_HBA, - GFP_KERNEL); - removed = kzalloc(sizeof(*removed) * CCISS_MAX_SCSI_DEVS_PER_HBA, - GFP_KERNEL); - - if (!added || !removed) { - dev_warn(&h->pdev->dev, - "Out of memory in adjust_cciss_scsi_table\n"); - goto free_and_out; - } - - CPQ_TAPE_LOCK(h, flags); - - if (hostno != -1) /* if it's not the first time... */ - sh = h->scsi_ctlr->scsi_host; - - /* find any devices in ccissscsi[] that are not in - sd[] and remove them from ccissscsi[] */ - - i = 0; - nremoved = 0; - nadded = 0; - while (i < ccissscsi[h->ctlr].ndevices) { - csd = &ccissscsi[h->ctlr].dev[i]; - found=0; - for (j=0;j<nsds;j++) { - if (SCSI3ADDR_EQ(sd[j].scsi3addr, - csd->scsi3addr)) { - if (device_is_the_same(&sd[j], csd)) - found=2; - else - found=1; - break; - } - } - - if (found == 0) { /* device no longer present. */ - changes++; - cciss_scsi_remove_entry(h, hostno, i, - removed, &nremoved); - /* remove ^^^, hence i not incremented */ - } else if (found == 1) { /* device is different in some way */ - changes++; - dev_info(&h->pdev->dev, - "device c%db%dt%dl%d has changed.\n", - hostno, csd->bus, csd->target, csd->lun); - cciss_scsi_remove_entry(h, hostno, i, - removed, &nremoved); - /* remove ^^^, hence i not incremented */ - if (cciss_scsi_add_entry(h, hostno, &sd[j], - added, &nadded) != 0) - /* we just removed one, so add can't fail. */ - BUG(); - csd->devtype = sd[j].devtype; - memcpy(csd->device_id, sd[j].device_id, - sizeof(csd->device_id)); - memcpy(csd->vendor, sd[j].vendor, - sizeof(csd->vendor)); - memcpy(csd->model, sd[j].model, - sizeof(csd->model)); - memcpy(csd->revision, sd[j].revision, - sizeof(csd->revision)); - } else /* device is same as it ever was, */ - i++; /* so just move along. */ - } - - /* Now, make sure every device listed in sd[] is also - listed in ccissscsi[], adding them if they aren't found */ - - for (i=0;i<nsds;i++) { - found=0; - for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) { - csd = &ccissscsi[h->ctlr].dev[j]; - if (SCSI3ADDR_EQ(sd[i].scsi3addr, - csd->scsi3addr)) { - if (device_is_the_same(&sd[i], csd)) - found=2; /* found device */ - else - found=1; /* found a bug. */ - break; - } - } - if (!found) { - changes++; - if (cciss_scsi_add_entry(h, hostno, &sd[i], - added, &nadded) != 0) - break; - } else if (found == 1) { - /* should never happen... */ - changes++; - dev_warn(&h->pdev->dev, - "device unexpectedly changed\n"); - /* but if it does happen, we just ignore that device */ - } - } - CPQ_TAPE_UNLOCK(h, flags); - - /* Don't notify scsi mid layer of any changes the first time through */ - /* (or if there are no changes) scsi_scan_host will do it later the */ - /* first time through. */ - if (hostno == -1 || !changes) - goto free_and_out; - - /* Notify scsi mid layer of any removed devices */ - for (i = 0; i < nremoved; i++) { - struct scsi_device *sdev = - scsi_device_lookup(sh, removed[i].bus, - removed[i].target, removed[i].lun); - if (sdev != NULL) { - scsi_remove_device(sdev); - scsi_device_put(sdev); - } else { - /* We don't expect to get here. */ - /* future cmds to this device will get selection */ - /* timeout as if the device was gone. */ - dev_warn(&h->pdev->dev, "didn't find " - "c%db%dt%dl%d\n for removal.", - hostno, removed[i].bus, - removed[i].target, removed[i].lun); - } - } - - /* Notify scsi mid layer of any added devices */ - for (i = 0; i < nadded; i++) { - int rc; - rc = scsi_add_device(sh, added[i].bus, - added[i].target, added[i].lun); - if (rc == 0) - continue; - dev_warn(&h->pdev->dev, "scsi_add_device " - "c%db%dt%dl%d failed, device not added.\n", - hostno, added[i].bus, added[i].target, added[i].lun); - /* now we have to remove it from ccissscsi, */ - /* since it didn't get added to scsi mid layer */ - fixup_botched_add(h, added[i].scsi3addr); - } - -free_and_out: - kfree(added); - kfree(removed); - return 0; -} - -static int -lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr) -{ - int i; - struct cciss_scsi_dev_t *sd; - unsigned long flags; - - CPQ_TAPE_LOCK(h, flags); - for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { - sd = &ccissscsi[h->ctlr].dev[i]; - if (sd->bus == bus && - sd->target == target && - sd->lun == lun) { - memcpy(scsi3addr, &sd->scsi3addr[0], 8); - CPQ_TAPE_UNLOCK(h, flags); - return 0; - } - } - CPQ_TAPE_UNLOCK(h, flags); - return -1; -} - -static void -cciss_scsi_setup(ctlr_info_t *h) -{ - struct cciss_scsi_adapter_data_t * shba; - - ccissscsi[h->ctlr].ndevices = 0; - shba = kmalloc(sizeof(*shba), GFP_KERNEL); - if (shba == NULL) - return; - shba->scsi_host = NULL; - spin_lock_init(&shba->lock); - shba->registered = 0; - if (scsi_cmd_stack_setup(h, shba) != 0) { - kfree(shba); - shba = NULL; - } - h->scsi_ctlr = shba; - return; -} - -static void complete_scsi_command(CommandList_struct *c, int timeout, - __u32 tag) -{ - struct scsi_cmnd *cmd; - ctlr_info_t *h; - ErrorInfo_struct *ei; - - ei = c->err_info; - - /* First, see if it was a message rather than a command */ - if (c->Request.Type.Type == TYPE_MSG) { - c->cmd_type = CMD_MSG_DONE; - return; - } - - cmd = (struct scsi_cmnd *) c->scsi_cmd; - h = hba[c->ctlr]; - - scsi_dma_unmap(cmd); - if (c->Header.SGTotal > h->max_cmd_sgentries) - cciss_unmap_sg_chain_block(h, c); - - cmd->result = (DID_OK << 16); /* host byte */ - cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ - /* cmd->result |= (GOOD < 1); */ /* status byte */ - - cmd->result |= (ei->ScsiStatus); - /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */ - - /* copy the sense data whether we need to or not. */ - - memcpy(cmd->sense_buffer, ei->SenseInfo, - ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? - SCSI_SENSE_BUFFERSIZE : - ei->SenseLen); - scsi_set_resid(cmd, ei->ResidualCnt); - - if (ei->CommandStatus != 0) { /* an error has occurred */ - switch (ei->CommandStatus) { - case CMD_TARGET_STATUS: - /* Pass it up to the upper layers... */ - if (!ei->ScsiStatus) { - - /* Ordinarily, this case should never happen, but there is a bug - in some released firmware revisions that allows it to happen - if, for example, a 4100 backplane loses power and the tape - drive is in it. We assume that it's a fatal error of some - kind because we can't show that it wasn't. We will make it - look like selection timeout since that is the most common - reason for this to occur, and it's severe enough. */ - - cmd->result = DID_NO_CONNECT << 16; - } - break; - case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ - break; - case CMD_DATA_OVERRUN: - dev_warn(&h->pdev->dev, "%p has" - " completed with data overrun " - "reported\n", c); - break; - case CMD_INVALID: { - /* - print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false); - print_cmd(c); - */ - /* We get CMD_INVALID if you address a non-existent tape drive instead - of a selection timeout (no response). You will see this if you yank - out a tape drive, then try to access it. This is kind of a shame - because it means that any other CMD_INVALID (e.g. driver bug) will - get interpreted as a missing target. */ - cmd->result = DID_NO_CONNECT << 16; - } - break; - case CMD_PROTOCOL_ERR: - cmd->result = DID_ERROR << 16; - dev_warn(&h->pdev->dev, - "%p has protocol error\n", c); - break; - case CMD_HARDWARE_ERR: - cmd->result = DID_ERROR << 16; - dev_warn(&h->pdev->dev, - "%p had hardware error\n", c); - break; - case CMD_CONNECTION_LOST: - cmd->result = DID_ERROR << 16; - dev_warn(&h->pdev->dev, - "%p had connection lost\n", c); - break; - case CMD_ABORTED: - cmd->result = DID_ABORT << 16; - dev_warn(&h->pdev->dev, "%p was aborted\n", c); - break; - case CMD_ABORT_FAILED: - cmd->result = DID_ERROR << 16; - dev_warn(&h->pdev->dev, - "%p reports abort failed\n", c); - break; - case CMD_UNSOLICITED_ABORT: - cmd->result = DID_ABORT << 16; - dev_warn(&h->pdev->dev, "%p aborted due to an " - "unsolicited abort\n", c); - break; - case CMD_TIMEOUT: - cmd->result = DID_TIME_OUT << 16; - dev_warn(&h->pdev->dev, "%p timedout\n", c); - break; - case CMD_UNABORTABLE: - cmd->result = DID_ERROR << 16; - dev_warn(&h->pdev->dev, "c %p command " - "unabortable\n", c); - break; - default: - cmd->result = DID_ERROR << 16; - dev_warn(&h->pdev->dev, - "%p returned unknown status %x\n", c, - ei->CommandStatus); - } - } - cmd->scsi_done(cmd); - scsi_cmd_free(h, c); -} - -static int -cciss_scsi_detect(ctlr_info_t *h) -{ - struct Scsi_Host *sh; - int error; - - sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *)); - if (sh == NULL) - goto fail; - sh->io_port = 0; // good enough? FIXME, - sh->n_io_port = 0; // I don't think we use these two... - sh->this_id = SELF_SCSI_ID; - sh->can_queue = cciss_tape_cmds; - sh->sg_tablesize = h->maxsgentries; - sh->max_cmd_len = MAX_COMMAND_SIZE; - sh->max_sectors = h->cciss_max_sectors; - - ((struct cciss_scsi_adapter_data_t *) - h->scsi_ctlr)->scsi_host = sh; - sh->hostdata[0] = (unsigned long) h; - sh->irq = h->intr[SIMPLE_MODE_INT]; - sh->unique_id = sh->irq; - error = scsi_add_host(sh, &h->pdev->dev); - if (error) - goto fail_host_put; - scsi_scan_host(sh); - return 1; - - fail_host_put: - scsi_host_put(sh); - fail: - return 0; -} - -static void -cciss_unmap_one(struct pci_dev *pdev, - CommandList_struct *c, - size_t buflen, - int data_direction) -{ - u64bit addr64; - - addr64.val32.lower = c->SG[0].Addr.lower; - addr64.val32.upper = c->SG[0].Addr.upper; - pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction); -} - -static void -cciss_map_one(struct pci_dev *pdev, - CommandList_struct *c, - unsigned char *buf, - size_t buflen, - int data_direction) -{ - __u64 addr64; - - addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction); - c->SG[0].Addr.lower = - (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF); - c->SG[0].Addr.upper = - (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF); - c->SG[0].Len = buflen; - c->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */ - c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */ -} - -static int -cciss_scsi_do_simple_cmd(ctlr_info_t *h, - CommandList_struct *c, - unsigned char *scsi3addr, - unsigned char *cdb, - unsigned char cdblen, - unsigned char *buf, int bufsize, - int direction) -{ - DECLARE_COMPLETION_ONSTACK(wait); - - c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */ - c->scsi_cmd = NULL; - c->Header.ReplyQueue = 0; /* unused in simple mode */ - memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN)); - c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ - // Fill in the request block... - - /* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", - scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3], - scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */ - - memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); - memcpy(c->Request.CDB, cdb, cdblen); - c->Request.Timeout = 0; - c->Request.CDBLen = cdblen; - c->Request.Type.Type = TYPE_CMD; - c->Request.Type.Attribute = ATTR_SIMPLE; - c->Request.Type.Direction = direction; - - /* Fill in the SG list and do dma mapping */ - cciss_map_one(h->pdev, c, (unsigned char *) buf, - bufsize, DMA_FROM_DEVICE); - - c->waiting = &wait; - enqueue_cmd_and_start_io(h, c); - wait_for_completion(&wait); - - /* undo the dma mapping */ - cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE); - return(0); -} - -static void -cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c) -{ - ErrorInfo_struct *ei; - - ei = c->err_info; - switch (ei->CommandStatus) { - case CMD_TARGET_STATUS: - dev_warn(&h->pdev->dev, - "cmd %p has completed with errors\n", c); - dev_warn(&h->pdev->dev, - "cmd %p has SCSI Status = %x\n", - c, ei->ScsiStatus); - if (ei->ScsiStatus == 0) - dev_warn(&h->pdev->dev, - "SCSI status is abnormally zero. " - "(probably indicates selection timeout " - "reported incorrectly due to a known " - "firmware bug, circa July, 2001.)\n"); - break; - case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ - dev_info(&h->pdev->dev, "UNDERRUN\n"); - break; - case CMD_DATA_OVERRUN: - dev_warn(&h->pdev->dev, "%p has" - " completed with data overrun " - "reported\n", c); - break; - case CMD_INVALID: { - /* controller unfortunately reports SCSI passthru's */ - /* to non-existent targets as invalid commands. */ - dev_warn(&h->pdev->dev, - "%p is reported invalid (probably means " - "target device no longer present)\n", c); - /* - print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false); - print_cmd(c); - */ - } - break; - case CMD_PROTOCOL_ERR: - dev_warn(&h->pdev->dev, "%p has protocol error\n", c); - break; - case CMD_HARDWARE_ERR: - /* cmd->result = DID_ERROR << 16; */ - dev_warn(&h->pdev->dev, "%p had hardware error\n", c); - break; - case CMD_CONNECTION_LOST: - dev_warn(&h->pdev->dev, "%p had connection lost\n", c); - break; - case CMD_ABORTED: - dev_warn(&h->pdev->dev, "%p was aborted\n", c); - break; - case CMD_ABORT_FAILED: - dev_warn(&h->pdev->dev, - "%p reports abort failed\n", c); - break; - case CMD_UNSOLICITED_ABORT: - dev_warn(&h->pdev->dev, - "%p aborted due to an unsolicited abort\n", c); - break; - case CMD_TIMEOUT: - dev_warn(&h->pdev->dev, "%p timedout\n", c); - break; - case CMD_UNABORTABLE: - dev_warn(&h->pdev->dev, - "%p unabortable\n", c); - break; - default: - dev_warn(&h->pdev->dev, - "%p returned unknown status %x\n", - c, ei->CommandStatus); - } -} - -static int -cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr, - unsigned char page, unsigned char *buf, - unsigned char bufsize) -{ - int rc; - CommandList_struct *c; - char cdb[6]; - ErrorInfo_struct *ei; - unsigned long flags; - - spin_lock_irqsave(&h->lock, flags); - c = scsi_cmd_alloc(h); - spin_unlock_irqrestore(&h->lock, flags); - - if (c == NULL) { /* trouble... */ - printk("cmd_alloc returned NULL!\n"); - return -1; - } - - ei = c->err_info; - - cdb[0] = CISS_INQUIRY; - cdb[1] = (page != 0); - cdb[2] = page; - cdb[3] = 0; - cdb[4] = bufsize; - cdb[5] = 0; - rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb, - 6, buf, bufsize, XFER_READ); - - if (rc != 0) return rc; /* something went wrong */ - - if (ei->CommandStatus != 0 && - ei->CommandStatus != CMD_DATA_UNDERRUN) { - cciss_scsi_interpret_error(h, c); - rc = -1; - } - spin_lock_irqsave(&h->lock, flags); - scsi_cmd_free(h, c); - spin_unlock_irqrestore(&h->lock, flags); - return rc; -} - -/* Get the device id from inquiry page 0x83 */ -static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr, - unsigned char *device_id, int buflen) -{ - int rc; - unsigned char *buf; - - if (buflen > 16) - buflen = 16; - buf = kzalloc(64, GFP_KERNEL); - if (!buf) - return -1; - rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); - if (rc == 0) - memcpy(device_id, &buf[8], buflen); - kfree(buf); - return rc != 0; -} - -static int -cciss_scsi_do_report_phys_luns(ctlr_info_t *h, - ReportLunData_struct *buf, int bufsize) -{ - int rc; - CommandList_struct *c; - unsigned char cdb[12]; - unsigned char scsi3addr[8]; - ErrorInfo_struct *ei; - unsigned long flags; - - spin_lock_irqsave(&h->lock, flags); - c = scsi_cmd_alloc(h); - spin_unlock_irqrestore(&h->lock, flags); - if (c == NULL) { /* trouble... */ - printk("cmd_alloc returned NULL!\n"); - return -1; - } - - memset(&scsi3addr[0], 0, 8); /* address the controller */ - cdb[0] = CISS_REPORT_PHYS; - cdb[1] = 0; - cdb[2] = 0; - cdb[3] = 0; - cdb[4] = 0; - cdb[5] = 0; - cdb[6] = (bufsize >> 24) & 0xFF; //MSB - cdb[7] = (bufsize >> 16) & 0xFF; - cdb[8] = (bufsize >> 8) & 0xFF; - cdb[9] = bufsize & 0xFF; - cdb[10] = 0; - cdb[11] = 0; - - rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, - cdb, 12, - (unsigned char *) buf, - bufsize, XFER_READ); - - if (rc != 0) return rc; /* something went wrong */ - - ei = c->err_info; - if (ei->CommandStatus != 0 && - ei->CommandStatus != CMD_DATA_UNDERRUN) { - cciss_scsi_interpret_error(h, c); - rc = -1; - } - spin_lock_irqsave(&h->lock, flags); - scsi_cmd_free(h, c); - spin_unlock_irqrestore(&h->lock, flags); - return rc; -} - -static void -cciss_update_non_disk_devices(ctlr_info_t *h, int hostno) -{ - /* the idea here is we could get notified from /proc - that some devices have changed, so we do a report - physical luns cmd, and adjust our list of devices - accordingly. (We can't rely on the scsi-mid layer just - doing inquiries, because the "busses" that the scsi - mid-layer probes are totally fabricated by this driver, - so new devices wouldn't show up. - - the scsi3addr's of devices won't change so long as the - adapter is not reset. That means we can rescan and - tell which devices we already know about, vs. new - devices, vs. disappearing devices. - - Also, if you yank out a tape drive, then put in a disk - in it's place, (say, a configured volume from another - array controller for instance) _don't_ poke this driver - (so it thinks it's still a tape, but _do_ poke the scsi - mid layer, so it does an inquiry... the scsi mid layer - will see the physical disk. This would be bad. Need to - think about how to prevent that. One idea would be to - snoop all scsi responses and if an inquiry repsonse comes - back that reports a disk, chuck it an return selection - timeout instead and adjust our table... Not sure i like - that though. - - */ -#define OBDR_TAPE_INQ_SIZE 49 -#define OBDR_TAPE_SIG "$DR-10" - ReportLunData_struct *ld_buff; - unsigned char *inq_buff; - unsigned char scsi3addr[8]; - __u32 num_luns=0; - unsigned char *ch; - struct cciss_scsi_dev_t *currentsd, *this_device; - int ncurrent=0; - int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8; - int i; - - ld_buff = kzalloc(reportlunsize, GFP_KERNEL); - inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); - currentsd = kzalloc(sizeof(*currentsd) * - (CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL); - if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) { - printk(KERN_ERR "cciss: out of memory\n"); - goto out; - } - this_device = ¤tsd[CCISS_MAX_SCSI_DEVS_PER_HBA]; - if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) { - ch = &ld_buff->LUNListLength[0]; - num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8; - if (num_luns > CISS_MAX_PHYS_LUN) { - printk(KERN_WARNING - "cciss: Maximum physical LUNs (%d) exceeded. " - "%d LUNs ignored.\n", CISS_MAX_PHYS_LUN, - num_luns - CISS_MAX_PHYS_LUN); - num_luns = CISS_MAX_PHYS_LUN; - } - } - else { - printk(KERN_ERR "cciss: Report physical LUNs failed.\n"); - goto out; - } - - - /* adjust our table of devices */ - for (i = 0; i < num_luns; i++) { - /* for each physical lun, do an inquiry */ - if (ld_buff->LUN[i][3] & 0xC0) continue; - memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE); - memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8); - - if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, - (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) - /* Inquiry failed (msg printed already) */ - continue; /* so we will skip this device. */ - - this_device->devtype = (inq_buff[0] & 0x1f); - this_device->bus = -1; - this_device->target = -1; - this_device->lun = -1; - memcpy(this_device->scsi3addr, scsi3addr, 8); - memcpy(this_device->vendor, &inq_buff[8], - sizeof(this_device->vendor)); - memcpy(this_device->model, &inq_buff[16], - sizeof(this_device->model)); - memcpy(this_device->revision, &inq_buff[32], - sizeof(this_device->revision)); - memset(this_device->device_id, 0, - sizeof(this_device->device_id)); - cciss_scsi_get_device_id(h, scsi3addr, - this_device->device_id, sizeof(this_device->device_id)); - - switch (this_device->devtype) { - case 0x05: /* CD-ROM */ { - - /* We don't *really* support actual CD-ROM devices, - * just this "One Button Disaster Recovery" tape drive - * which temporarily pretends to be a CD-ROM drive. - * So we check that the device is really an OBDR tape - * device by checking for "$DR-10" in bytes 43-48 of - * the inquiry data. - */ - char obdr_sig[7]; - - strncpy(obdr_sig, &inq_buff[43], 6); - obdr_sig[6] = '\0'; - if (strncmp(obdr_sig, OBDR_TAPE_SIG, 6) != 0) - /* Not OBDR device, ignore it. */ - break; - } - /* fall through . . . */ - case 0x01: /* sequential access, (tape) */ - case 0x08: /* medium changer */ - if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) { - printk(KERN_INFO "cciss%d: %s ignored, " - "too many devices.\n", h->ctlr, - scsi_device_type(this_device->devtype)); - break; - } - currentsd[ncurrent] = *this_device; - ncurrent++; - break; - default: - break; - } - } - - adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent); -out: - kfree(inq_buff); - kfree(ld_buff); - kfree(currentsd); - return; -} - -static int -is_keyword(char *ptr, int len, char *verb) // Thanks to ncr53c8xx.c -{ - int verb_len = strlen(verb); - if (len >= verb_len && !memcmp(verb,ptr,verb_len)) - return verb_len; - else - return 0; -} - -static int -cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length) -{ - int arg_len; - - if ((arg_len = is_keyword(buffer, length, "rescan")) != 0) - cciss_update_non_disk_devices(h, hostno); - else - return -EINVAL; - return length; -} - -static int -cciss_scsi_write_info(struct Scsi_Host *sh, - char *buffer, /* data buffer */ - int length) /* length of data in buffer */ -{ - ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0]; - if (h == NULL) /* This really shouldn't ever happen. */ - return -EINVAL; - - return cciss_scsi_user_command(h, sh->host_no, - buffer, length); -} - -static int -cciss_scsi_show_info(struct seq_file *m, struct Scsi_Host *sh) -{ - - ctlr_info_t *h = (ctlr_info_t *) sh->hostdata[0]; - int i; - - if (h == NULL) /* This really shouldn't ever happen. */ - return -EINVAL; - - seq_printf(m, "cciss%d: SCSI host: %d\n", - h->ctlr, sh->host_no); - - /* this information is needed by apps to know which cciss - device corresponds to which scsi host number without - having to open a scsi target device node. The device - information is not a duplicate of /proc/scsi/scsi because - the two may be out of sync due to scsi hotplug, rather - this info is for an app to be able to use to know how to - get them back in sync. */ - - for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) { - struct cciss_scsi_dev_t *sd = - &ccissscsi[h->ctlr].dev[i]; - seq_printf(m, "c%db%dt%dl%d %02d " - "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", - sh->host_no, sd->bus, sd->target, sd->lun, - sd->devtype, - sd->scsi3addr[0], sd->scsi3addr[1], - sd->scsi3addr[2], sd->scsi3addr[3], - sd->scsi3addr[4], sd->scsi3addr[5], - sd->scsi3addr[6], sd->scsi3addr[7]); - } - return 0; -} - -/* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci - dma mapping and fills in the scatter gather entries of the - cciss command, c. */ - -static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c, - struct scsi_cmnd *cmd) -{ - unsigned int len; - struct scatterlist *sg; - __u64 addr64; - int request_nsgs, i, chained, sg_index; - struct cciss_scsi_adapter_data_t *sa = h->scsi_ctlr; - SGDescriptor_struct *curr_sg; - - BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); - - chained = 0; - sg_index = 0; - curr_sg = c->SG; - request_nsgs = scsi_dma_map(cmd); - if (request_nsgs) { - scsi_for_each_sg(cmd, sg, request_nsgs, i) { - if (sg_index + 1 == h->max_cmd_sgentries && - !chained && request_nsgs - i > 1) { - chained = 1; - sg_index = 0; - curr_sg = sa->cmd_sg_list[c->cmdindex]; - } - addr64 = (__u64) sg_dma_address(sg); - len = sg_dma_len(sg); - curr_sg[sg_index].Addr.lower = - (__u32) (addr64 & 0x0FFFFFFFFULL); - curr_sg[sg_index].Addr.upper = - (__u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); - curr_sg[sg_index].Len = len; - curr_sg[sg_index].Ext = 0; - ++sg_index; - } - if (chained) - cciss_map_sg_chain_block(h, c, - sa->cmd_sg_list[c->cmdindex], - (request_nsgs - (h->max_cmd_sgentries - 1)) * - sizeof(SGDescriptor_struct)); - } - /* track how many SG entries we are using */ - if (request_nsgs > h->maxSG) - h->maxSG = request_nsgs; - c->Header.SGTotal = (u16) request_nsgs + chained; - if (request_nsgs > h->max_cmd_sgentries) - c->Header.SGList = h->max_cmd_sgentries; - else - c->Header.SGList = c->Header.SGTotal; - return; -} - - -static int -cciss_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) -{ - ctlr_info_t *h; - int rc; - unsigned char scsi3addr[8]; - CommandList_struct *c; - unsigned long flags; - - // Get the ptr to our adapter structure (hba[i]) out of cmd->host. - // We violate cmd->host privacy here. (Is there another way?) - h = (ctlr_info_t *) cmd->device->host->hostdata[0]; - - rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id, - cmd->device->lun, scsi3addr); - if (rc != 0) { - /* the scsi nexus does not match any that we presented... */ - /* pretend to mid layer that we got selection timeout */ - cmd->result = DID_NO_CONNECT << 16; - done(cmd); - /* we might want to think about registering controller itself - as a processor device on the bus so sg binds to it. */ - return 0; - } - - /* Ok, we have a reasonable scsi nexus, so send the cmd down, and - see what the device thinks of it. */ - - spin_lock_irqsave(&h->lock, flags); - c = scsi_cmd_alloc(h); - spin_unlock_irqrestore(&h->lock, flags); - if (c == NULL) { /* trouble... */ - dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n"); - /* FIXME: next 3 lines are -> BAD! <- */ - cmd->result = DID_NO_CONNECT << 16; - done(cmd); - return 0; - } - - // Fill in the command list header - - cmd->scsi_done = done; // save this for use by completion code - - /* save c in case we have to abort it */ - cmd->host_scribble = (unsigned char *) c; - - c->cmd_type = CMD_SCSI; - c->scsi_cmd = cmd; - c->Header.ReplyQueue = 0; /* unused in simple mode */ - memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); - c->Header.Tag.lower = c->busaddr; /* Use k. address of cmd as tag */ - - // Fill in the request block... - - c->Request.Timeout = 0; - memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); - BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); - c->Request.CDBLen = cmd->cmd_len; - memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); - c->Request.Type.Type = TYPE_CMD; - c->Request.Type.Attribute = ATTR_SIMPLE; - switch (cmd->sc_data_direction) { - case DMA_TO_DEVICE: - c->Request.Type.Direction = XFER_WRITE; - break; - case DMA_FROM_DEVICE: - c->Request.Type.Direction = XFER_READ; - break; - case DMA_NONE: - c->Request.Type.Direction = XFER_NONE; - break; - case DMA_BIDIRECTIONAL: - // This can happen if a buggy application does a scsi passthru - // and sets both inlen and outlen to non-zero. ( see - // ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) - - c->Request.Type.Direction = XFER_RSVD; - // This is technically wrong, and cciss controllers should - // reject it with CMD_INVALID, which is the most correct - // response, but non-fibre backends appear to let it - // slide by, and give the same results as if this field - // were set correctly. Either way is acceptable for - // our purposes here. - - break; - - default: - dev_warn(&h->pdev->dev, "unknown data direction: %d\n", - cmd->sc_data_direction); - BUG(); - break; - } - cciss_scatter_gather(h, c, cmd); - enqueue_cmd_and_start_io(h, c); - /* the cmd'll come back via intr handler in complete_scsi_command() */ - return 0; -} - -static DEF_SCSI_QCMD(cciss_scsi_queue_command) - -static void cciss_unregister_scsi(ctlr_info_t *h) -{ - struct cciss_scsi_adapter_data_t *sa; - struct cciss_scsi_cmd_stack_t *stk; - unsigned long flags; - - /* we are being forcibly unloaded, and may not refuse. */ - - spin_lock_irqsave(&h->lock, flags); - sa = h->scsi_ctlr; - stk = &sa->cmd_stack; - - /* if we weren't ever actually registered, don't unregister */ - if (sa->registered) { - spin_unlock_irqrestore(&h->lock, flags); - scsi_remove_host(sa->scsi_host); - scsi_host_put(sa->scsi_host); - spin_lock_irqsave(&h->lock, flags); - } - - /* set scsi_host to NULL so our detect routine will - find us on register */ - sa->scsi_host = NULL; - spin_unlock_irqrestore(&h->lock, flags); - scsi_cmd_stack_free(h); - kfree(sa); -} - -static int cciss_engage_scsi(ctlr_info_t *h) -{ - struct cciss_scsi_adapter_data_t *sa; - struct cciss_scsi_cmd_stack_t *stk; - unsigned long flags; - - spin_lock_irqsave(&h->lock, flags); - sa = h->scsi_ctlr; - stk = &sa->cmd_stack; - - if (sa->registered) { - dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n"); - spin_unlock_irqrestore(&h->lock, flags); - return -ENXIO; - } - sa->registered = 1; - spin_unlock_irqrestore(&h->lock, flags); - cciss_update_non_disk_devices(h, -1); - cciss_scsi_detect(h); - return 0; -} - -static void -cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h) -{ - unsigned long flags; - - CPQ_TAPE_LOCK(h, flags); - seq_printf(seq, - "Sequential access devices: %d\n\n", - ccissscsi[h->ctlr].ndevices); - CPQ_TAPE_UNLOCK(h, flags); -} - -static int wait_for_device_to_become_ready(ctlr_info_t *h, - unsigned char lunaddr[]) -{ - int rc; - int count = 0; - int waittime = HZ; - CommandList_struct *c; - - c = cmd_alloc(h); - if (!c) { - dev_warn(&h->pdev->dev, "out of memory in " - "wait_for_device_to_become_ready.\n"); - return IO_ERROR; - } - - /* Send test unit ready until device ready, or give up. */ - while (count < 20) { - - /* Wait for a bit. do this first, because if we send - * the TUR right away, the reset will just abort it. - */ - schedule_timeout_uninterruptible(waittime); - count++; - - /* Increase wait time with each try, up to a point. */ - if (waittime < (HZ * 30)) - waittime = waittime * 2; - - /* Send the Test Unit Ready */ - rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0, - lunaddr, TYPE_CMD); - if (rc == 0) - rc = sendcmd_withirq_core(h, c, 0); - - (void) process_sendcmd_error(h, c); - - if (rc != 0) - goto retry_tur; - - if (c->err_info->CommandStatus == CMD_SUCCESS) - break; - - if (c->err_info->CommandStatus == CMD_TARGET_STATUS && - c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION) { - if (c->err_info->SenseInfo[2] == NO_SENSE) - break; - if (c->err_info->SenseInfo[2] == UNIT_ATTENTION) { - unsigned char asc; - asc = c->err_info->SenseInfo[12]; - check_for_unit_attention(h, c); - if (asc == POWER_OR_RESET) - break; - } - } -retry_tur: - dev_warn(&h->pdev->dev, "Waiting %d secs " - "for device to become ready.\n", - waittime / HZ); - rc = 1; /* device not ready. */ - } - - if (rc) - dev_warn(&h->pdev->dev, "giving up on device.\n"); - else - dev_warn(&h->pdev->dev, "device is ready.\n"); - - cmd_free(h, c); - return rc; -} - -/* Need at least one of these error handlers to keep ../scsi/hosts.c from - * complaining. Doing a host- or bus-reset can't do anything good here. - * Despite what it might say in scsi_error.c, there may well be commands - * on the controller, as the cciss driver registers twice, once as a block - * device for the logical drives, and once as a scsi device, for any tape - * drives. So we know there are no commands out on the tape drives, but we - * don't know there are no commands on the controller, and it is likely - * that there probably are, as the cciss block device is most commonly used - * as a boot device (embedded controller on HP/Compaq systems.) -*/ - -static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd) -{ - int rc; - CommandList_struct *cmd_in_trouble; - unsigned char lunaddr[8]; - ctlr_info_t *h; - - /* find the controller to which the command to be aborted was sent */ - h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; - if (h == NULL) /* paranoia */ - return FAILED; - dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n"); - /* find the command that's giving us trouble */ - cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble; - if (cmd_in_trouble == NULL) /* paranoia */ - return FAILED; - memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8); - /* send a reset to the SCSI LUN which the command was sent to */ - rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr, - TYPE_MSG); - if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0) - return SUCCESS; - dev_warn(&h->pdev->dev, "resetting device failed.\n"); - return FAILED; -} - -static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd) -{ - int rc; - CommandList_struct *cmd_to_abort; - unsigned char lunaddr[8]; - ctlr_info_t *h; - - /* find the controller to which the command to be aborted was sent */ - h = (ctlr_info_t *) scsicmd->device->host->hostdata[0]; - if (h == NULL) /* paranoia */ - return FAILED; - dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n"); - - /* find the command to be aborted */ - cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble; - if (cmd_to_abort == NULL) /* paranoia */ - return FAILED; - memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8); - rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag, - 0, 0, lunaddr, TYPE_MSG); - if (rc == 0) - return SUCCESS; - return FAILED; - -} - -#else /* no CONFIG_CISS_SCSI_TAPE */ - -/* If no tape support, then these become defined out of existence */ - -#define cciss_scsi_setup(cntl_num) -#define cciss_engage_scsi(h) - -#endif /* CONFIG_CISS_SCSI_TAPE */ |