--- /dev/null
+/*
+ * 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,
+ .cmd_per_lun = 1,
+ .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 int xmargin=8;
+static int amargin=60;
+
+static void
+print_bytes (unsigned char *c, int len, int hex, int ascii)
+{
+
+ int i;
+ unsigned char *x;
+
+ if (hex)
+ {
+ x = c;
+ for (i=0;i<len;i++)
+ {
+ if ((i % xmargin) == 0 && i>0) printk("\n");
+ if ((i % xmargin) == 0) printk("0x%04x:", i);
+ printk(" %02x", *x);
+ x++;
+ }
+ printk("\n");
+ }
+ if (ascii)
+ {
+ x = c;
+ for (i=0;i<len;i++)
+ {
+ if ((i % amargin) == 0 && i>0) printk("\n");
+ if ((i % amargin) == 0) printk("0x%04x:", i);
+ if (*x > 26 && *x < 128) printk("%c", *x);
+ else printk(".");
+ x++;
+ }
+ printk("\n");
+ }
+}
+
+static void
+print_cmd(CommandList_struct *cp)
+{
+ printk("queue:%d\n", cp->Header.ReplyQueue);
+ printk("sglist:%d\n", cp->Header.SGList);
+ printk("sgtot:%d\n", cp->Header.SGTotal);
+ printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
+ cp->Header.Tag.lower);
+ printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
+ cp->Header.LUN.LunAddrBytes[0],
+ cp->Header.LUN.LunAddrBytes[1],
+ cp->Header.LUN.LunAddrBytes[2],
+ cp->Header.LUN.LunAddrBytes[3],
+ cp->Header.LUN.LunAddrBytes[4],
+ cp->Header.LUN.LunAddrBytes[5],
+ cp->Header.LUN.LunAddrBytes[6],
+ cp->Header.LUN.LunAddrBytes[7]);
+ printk("CDBLen:%d\n", cp->Request.CDBLen);
+ printk("Type:%d\n",cp->Request.Type.Type);
+ printk("Attr:%d\n",cp->Request.Type.Attribute);
+ printk(" Dir:%d\n",cp->Request.Type.Direction);
+ printk("Timeout:%d\n",cp->Request.Timeout);
+ printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
+ " %02x %02x %02x %02x %02x %02x %02x %02x\n",
+ cp->Request.CDB[0], cp->Request.CDB[1],
+ cp->Request.CDB[2], cp->Request.CDB[3],
+ cp->Request.CDB[4], cp->Request.CDB[5],
+ cp->Request.CDB[6], cp->Request.CDB[7],
+ cp->Request.CDB[8], cp->Request.CDB[9],
+ cp->Request.CDB[10], cp->Request.CDB[11],
+ cp->Request.CDB[12], cp->Request.CDB[13],
+ cp->Request.CDB[14], cp->Request.CDB[15]),
+ printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n",
+ cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
+ cp->ErrDesc.Len);
+ printk("sgs..........Errorinfo:\n");
+ printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
+ printk("senselen:%d\n", cp->err_info->SenseLen);
+ printk("cmd status:%d\n", cp->err_info->CommandStatus);
+ printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
+ printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
+ printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
+ printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
+
+}
+
+#endif
+
+static int
+find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun)
+{
+ /* finds an unused bus, target, lun for a new device */
+ /* assumes h->scsi_ctlr->lock is held */
+ int i, found=0;
+ unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
+
+ memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
+
+ target_taken[SELF_SCSI_ID] = 1;
+ for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++)
+ target_taken[ccissscsi[h->ctlr].dev[i].target] = 1;
+
+ for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) {
+ if (!target_taken[i]) {
+ *bus = 0; *target=i; *lun = 0; found=1;
+ break;
+ }
+ }
+ return (!found);
+}
+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 = (struct cciss_scsi_adapter_data_t *)
+ kmalloc(sizeof(*shba), GFP_KERNEL);
+ if (shba == NULL)
+ return;
+ shba->scsi_host = NULL;
+ spin_lock_init(&shba->lock);
+ shba->registered = 0;
+ if (scsi_cmd_stack_setup(h, shba) != 0) {
+ kfree(shba);
+ shba = NULL;
+ }
+ h->scsi_ctlr = shba;
+ return;
+}
+
+static void complete_scsi_command(CommandList_struct *c, int timeout,
+ __u32 tag)
+{
+ struct scsi_cmnd *cmd;
+ ctlr_info_t *h;
+ ErrorInfo_struct *ei;
+
+ ei = c->err_info;
+
+ /* First, see if it was a message rather than a command */
+ if (c->Request.Type.Type == TYPE_MSG) {
+ c->cmd_type = CMD_MSG_DONE;
+ return;
+ }
+
+ cmd = (struct scsi_cmnd *) c->scsi_cmd;
+ h = hba[c->ctlr];
+
+ scsi_dma_unmap(cmd);
+ if (c->Header.SGTotal > h->max_cmd_sgentries)
+ cciss_unmap_sg_chain_block(h, c);
+
+ cmd->result = (DID_OK << 16); /* host byte */
+ cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
+ /* cmd->result |= (GOOD < 1); */ /* status byte */
+
+ cmd->result |= (ei->ScsiStatus);
+ /* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */
+
+ /* copy the sense data whether we need to or not. */
+
+ memcpy(cmd->sense_buffer, ei->SenseInfo,
+ ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
+ SCSI_SENSE_BUFFERSIZE :
+ ei->SenseLen);
+ scsi_set_resid(cmd, ei->ResidualCnt);
+
+ if(ei->CommandStatus != 0)
+ { /* an error has occurred */
+ switch(ei->CommandStatus)
+ {
+ case CMD_TARGET_STATUS:
+ /* Pass it up to the upper layers... */
+ if (!ei->ScsiStatus) {
+
+ /* Ordinarily, this case should never happen, but there is a bug
+ in some released firmware revisions that allows it to happen
+ if, for example, a 4100 backplane loses power and the tape
+ drive is in it. We assume that it's a fatal error of some
+ kind because we can't show that it wasn't. We will make it
+ look like selection timeout since that is the most common
+ reason for this to occur, and it's severe enough. */
+
+ cmd->result = DID_NO_CONNECT << 16;
+ }
+ break;
+ case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
+ break;
+ case CMD_DATA_OVERRUN:
+ dev_warn(&h->pdev->dev, "%p has"
+ " completed with data overrun "
+ "reported\n", c);
+ break;
+ case CMD_INVALID: {
+ /* print_bytes(c, sizeof(*c), 1, 0);
+ print_cmd(c); */
+ /* We get CMD_INVALID if you address a non-existent tape drive instead
+ of a selection timeout (no response). You will see this if you yank
+ out a tape drive, then try to access it. This is kind of a shame
+ because it means that any other CMD_INVALID (e.g. driver bug) will
+ get interpreted as a missing target. */
+ cmd->result = DID_NO_CONNECT << 16;
+ }
+ break;
+ case CMD_PROTOCOL_ERR:
+ cmd->result = DID_ERROR << 16;
+ dev_warn(&h->pdev->dev,
+ "%p has protocol error\n", c);
+ break;
+ case CMD_HARDWARE_ERR:
+ cmd->result = DID_ERROR << 16;
+ dev_warn(&h->pdev->dev,
+ "%p had hardware error\n", c);
+ break;
+ case CMD_CONNECTION_LOST:
+ cmd->result = DID_ERROR << 16;
+ dev_warn(&h->pdev->dev,
+ "%p had connection lost\n", c);
+ break;
+ case CMD_ABORTED:
+ cmd->result = DID_ABORT << 16;
+ dev_warn(&h->pdev->dev, "%p was aborted\n", c);
+ break;
+ case CMD_ABORT_FAILED:
+ cmd->result = DID_ERROR << 16;
+ dev_warn(&h->pdev->dev,
+ "%p reports abort failed\n", c);
+ break;
+ case CMD_UNSOLICITED_ABORT:
+ cmd->result = DID_ABORT << 16;
+ dev_warn(&h->pdev->dev, "%p aborted due to an "
+ "unsolicited abort\n", c);
+ break;
+ case CMD_TIMEOUT:
+ cmd->result = DID_TIME_OUT << 16;
+ dev_warn(&h->pdev->dev, "%p timedout\n", c);
+ break;
+ case CMD_UNABORTABLE:
+ cmd->result = DID_ERROR << 16;
+ dev_warn(&h->pdev->dev, "c %p command "
+ "unabortable\n", c);
+ break;
+ default:
+ cmd->result = DID_ERROR << 16;
+ dev_warn(&h->pdev->dev,
+ "%p returned unknown status %x\n", c,
+ ei->CommandStatus);
+ }
+ }
+ cmd->scsi_done(cmd);
+ scsi_cmd_free(h, c);
+}
+
+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_bytes((unsigned char *) c, sizeof(*c), 1, 0);
+ print_cmd(c); */
+ }
+ break;
+ case CMD_PROTOCOL_ERR:
+ dev_warn(&h->pdev->dev, "%p has protocol error\n", c);
+ break;
+ case CMD_HARDWARE_ERR:
+ /* cmd->result = DID_ERROR << 16; */
+ dev_warn(&h->pdev->dev, "%p had hardware error\n", c);
+ break;
+ case CMD_CONNECTION_LOST:
+ dev_warn(&h->pdev->dev, "%p had connection lost\n", c);
+ break;
+ case CMD_ABORTED:
+ dev_warn(&h->pdev->dev, "%p was aborted\n", c);
+ break;
+ case CMD_ABORT_FAILED:
+ dev_warn(&h->pdev->dev,
+ "%p reports abort failed\n", c);
+ break;
+ case CMD_UNSOLICITED_ABORT:
+ dev_warn(&h->pdev->dev,
+ "%p aborted due to an unsolicited abort\n", c);
+ break;
+ case CMD_TIMEOUT:
+ dev_warn(&h->pdev->dev, "%p timedout\n", c);
+ break;
+ case CMD_UNABORTABLE:
+ dev_warn(&h->pdev->dev,
+ "%p unabortable\n", c);
+ break;
+ default:
+ dev_warn(&h->pdev->dev,
+ "%p returned unknown status %x\n",
+ c, ei->CommandStatus);
+ }
+}
+
+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 */
Code Review / kvmfornfv.git / blobdiff