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path: root/drivers/block/cciss_scsi.c
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Diffstat (limited to 'drivers/block/cciss_scsi.c')
-rw-r--r--drivers/block/cciss_scsi.c1653
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 = &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;
-}
-
-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 */