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1712 lines
48 KiB
C
1712 lines
48 KiB
C
/*
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* Disk Array driver for HP Smart Array controllers, SCSI Tape module.
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* (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA
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* 02111-1307, USA.
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*
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* Questions/Comments/Bugfixes to iss_storagedev@hp.com
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*
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* Author: Stephen M. Cameron
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*/
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#ifdef CONFIG_CISS_SCSI_TAPE
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/* Here we have code to present the driver as a scsi driver
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as it is simultaneously presented as a block driver. The
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reason for doing this is to allow access to SCSI tape drives
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through the array controller. Note in particular, neither
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physical nor logical disks are presented through the scsi layer. */
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#include <linux/timer.h>
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#include <linux/completion.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/atomic.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include "cciss_scsi.h"
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#define CCISS_ABORT_MSG 0x00
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#define CCISS_RESET_MSG 0x01
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static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
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size_t size,
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__u8 page_code, unsigned char *scsi3addr,
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int cmd_type);
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static CommandList_struct *cmd_alloc(ctlr_info_t *h);
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static CommandList_struct *cmd_special_alloc(ctlr_info_t *h);
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static void cmd_free(ctlr_info_t *h, CommandList_struct *c);
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static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c);
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static int cciss_scsi_write_info(struct Scsi_Host *sh,
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char *buffer, /* data buffer */
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int length); /* length of data in buffer */
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static int cciss_scsi_show_info(struct seq_file *m,
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struct Scsi_Host *sh);
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static int cciss_scsi_queue_command (struct Scsi_Host *h,
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struct scsi_cmnd *cmd);
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static int cciss_eh_device_reset_handler(struct scsi_cmnd *);
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static int cciss_eh_abort_handler(struct scsi_cmnd *);
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static struct cciss_scsi_hba_t ccissscsi[MAX_CTLR] = {
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{ .name = "cciss0", .ndevices = 0 },
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{ .name = "cciss1", .ndevices = 0 },
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{ .name = "cciss2", .ndevices = 0 },
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{ .name = "cciss3", .ndevices = 0 },
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{ .name = "cciss4", .ndevices = 0 },
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{ .name = "cciss5", .ndevices = 0 },
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{ .name = "cciss6", .ndevices = 0 },
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{ .name = "cciss7", .ndevices = 0 },
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};
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static struct scsi_host_template cciss_driver_template = {
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.module = THIS_MODULE,
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.name = "cciss",
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.proc_name = "cciss",
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.write_info = cciss_scsi_write_info,
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.show_info = cciss_scsi_show_info,
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.queuecommand = cciss_scsi_queue_command,
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.this_id = 7,
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.cmd_per_lun = 1,
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.use_clustering = DISABLE_CLUSTERING,
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/* Can't have eh_bus_reset_handler or eh_host_reset_handler for cciss */
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.eh_device_reset_handler= cciss_eh_device_reset_handler,
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.eh_abort_handler = cciss_eh_abort_handler,
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};
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#pragma pack(1)
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#define SCSI_PAD_32 8
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#define SCSI_PAD_64 8
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struct cciss_scsi_cmd_stack_elem_t {
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CommandList_struct cmd;
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ErrorInfo_struct Err;
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__u32 busaddr;
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int cmdindex;
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u8 pad[IS_32_BIT * SCSI_PAD_32 + IS_64_BIT * SCSI_PAD_64];
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};
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#pragma pack()
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#pragma pack(1)
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struct cciss_scsi_cmd_stack_t {
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struct cciss_scsi_cmd_stack_elem_t *pool;
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struct cciss_scsi_cmd_stack_elem_t **elem;
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dma_addr_t cmd_pool_handle;
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int top;
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int nelems;
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};
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#pragma pack()
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struct cciss_scsi_adapter_data_t {
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struct Scsi_Host *scsi_host;
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struct cciss_scsi_cmd_stack_t cmd_stack;
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SGDescriptor_struct **cmd_sg_list;
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int registered;
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spinlock_t lock; // to protect ccissscsi[ctlr];
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};
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#define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \
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&h->scsi_ctlr->lock, flags);
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#define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \
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&h->scsi_ctlr->lock, flags);
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static CommandList_struct *
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scsi_cmd_alloc(ctlr_info_t *h)
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{
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/* assume only one process in here at a time, locking done by caller. */
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/* use h->lock */
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/* might be better to rewrite how we allocate scsi commands in a way that */
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/* needs no locking at all. */
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/* take the top memory chunk off the stack and return it, if any. */
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struct cciss_scsi_cmd_stack_elem_t *c;
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struct cciss_scsi_adapter_data_t *sa;
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struct cciss_scsi_cmd_stack_t *stk;
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u64bit temp64;
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sa = h->scsi_ctlr;
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stk = &sa->cmd_stack;
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if (stk->top < 0)
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return NULL;
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c = stk->elem[stk->top];
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/* memset(c, 0, sizeof(*c)); */
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memset(&c->cmd, 0, sizeof(c->cmd));
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memset(&c->Err, 0, sizeof(c->Err));
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/* set physical addr of cmd and addr of scsi parameters */
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c->cmd.busaddr = c->busaddr;
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c->cmd.cmdindex = c->cmdindex;
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/* (__u32) (stk->cmd_pool_handle +
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(sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top)); */
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temp64.val = (__u64) (c->busaddr + sizeof(CommandList_struct));
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/* (__u64) (stk->cmd_pool_handle +
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(sizeof(struct cciss_scsi_cmd_stack_elem_t)*stk->top) +
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sizeof(CommandList_struct)); */
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stk->top--;
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c->cmd.ErrDesc.Addr.lower = temp64.val32.lower;
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c->cmd.ErrDesc.Addr.upper = temp64.val32.upper;
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c->cmd.ErrDesc.Len = sizeof(ErrorInfo_struct);
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c->cmd.ctlr = h->ctlr;
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c->cmd.err_info = &c->Err;
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return (CommandList_struct *) c;
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}
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static void
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scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
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{
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/* assume only one process in here at a time, locking done by caller. */
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/* use h->lock */
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/* drop the free memory chunk on top of the stack. */
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struct cciss_scsi_adapter_data_t *sa;
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struct cciss_scsi_cmd_stack_t *stk;
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sa = h->scsi_ctlr;
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stk = &sa->cmd_stack;
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stk->top++;
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if (stk->top >= stk->nelems) {
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dev_err(&h->pdev->dev,
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"scsi_cmd_free called too many times.\n");
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BUG();
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}
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stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
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}
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static int
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scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
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{
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int i;
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struct cciss_scsi_cmd_stack_t *stk;
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size_t size;
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stk = &sa->cmd_stack;
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stk->nelems = cciss_tape_cmds + 2;
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sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
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h->chainsize, stk->nelems);
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if (!sa->cmd_sg_list && h->chainsize > 0)
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return -ENOMEM;
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size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
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/* Check alignment, see cciss_cmd.h near CommandList_struct def. */
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BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
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/* pci_alloc_consistent guarantees 32-bit DMA address will be used */
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stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
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pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
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if (stk->pool == NULL) {
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cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
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sa->cmd_sg_list = NULL;
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return -ENOMEM;
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}
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stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL);
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if (!stk->elem) {
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pci_free_consistent(h->pdev, size, stk->pool,
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stk->cmd_pool_handle);
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return -1;
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}
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for (i = 0; i < stk->nelems; i++) {
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stk->elem[i] = &stk->pool[i];
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stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
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(sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
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stk->elem[i]->cmdindex = i;
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}
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stk->top = stk->nelems-1;
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return 0;
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}
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static void
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scsi_cmd_stack_free(ctlr_info_t *h)
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{
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struct cciss_scsi_adapter_data_t *sa;
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struct cciss_scsi_cmd_stack_t *stk;
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size_t size;
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sa = h->scsi_ctlr;
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stk = &sa->cmd_stack;
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if (stk->top != stk->nelems-1) {
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dev_warn(&h->pdev->dev,
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"bug: %d scsi commands are still outstanding.\n",
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stk->nelems - stk->top);
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}
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size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
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pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
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stk->pool = NULL;
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cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
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kfree(stk->elem);
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stk->elem = NULL;
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}
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#if 0
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static int xmargin=8;
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static int amargin=60;
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static void
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print_bytes (unsigned char *c, int len, int hex, int ascii)
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{
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int i;
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unsigned char *x;
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if (hex)
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{
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x = c;
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for (i=0;i<len;i++)
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{
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if ((i % xmargin) == 0 && i>0) printk("\n");
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if ((i % xmargin) == 0) printk("0x%04x:", i);
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printk(" %02x", *x);
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x++;
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}
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printk("\n");
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}
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if (ascii)
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{
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x = c;
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for (i=0;i<len;i++)
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{
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if ((i % amargin) == 0 && i>0) printk("\n");
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if ((i % amargin) == 0) printk("0x%04x:", i);
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if (*x > 26 && *x < 128) printk("%c", *x);
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else printk(".");
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x++;
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}
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printk("\n");
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}
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}
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static void
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print_cmd(CommandList_struct *cp)
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{
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printk("queue:%d\n", cp->Header.ReplyQueue);
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printk("sglist:%d\n", cp->Header.SGList);
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printk("sgtot:%d\n", cp->Header.SGTotal);
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printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
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cp->Header.Tag.lower);
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printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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cp->Header.LUN.LunAddrBytes[0],
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cp->Header.LUN.LunAddrBytes[1],
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cp->Header.LUN.LunAddrBytes[2],
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cp->Header.LUN.LunAddrBytes[3],
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cp->Header.LUN.LunAddrBytes[4],
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cp->Header.LUN.LunAddrBytes[5],
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cp->Header.LUN.LunAddrBytes[6],
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cp->Header.LUN.LunAddrBytes[7]);
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printk("CDBLen:%d\n", cp->Request.CDBLen);
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printk("Type:%d\n",cp->Request.Type.Type);
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printk("Attr:%d\n",cp->Request.Type.Attribute);
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printk(" Dir:%d\n",cp->Request.Type.Direction);
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printk("Timeout:%d\n",cp->Request.Timeout);
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printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
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" %02x %02x %02x %02x %02x %02x %02x %02x\n",
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cp->Request.CDB[0], cp->Request.CDB[1],
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cp->Request.CDB[2], cp->Request.CDB[3],
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cp->Request.CDB[4], cp->Request.CDB[5],
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cp->Request.CDB[6], cp->Request.CDB[7],
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cp->Request.CDB[8], cp->Request.CDB[9],
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cp->Request.CDB[10], cp->Request.CDB[11],
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cp->Request.CDB[12], cp->Request.CDB[13],
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cp->Request.CDB[14], cp->Request.CDB[15]),
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printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n",
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cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
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cp->ErrDesc.Len);
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printk("sgs..........Errorinfo:\n");
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printk("scsistatus:%d\n", cp->err_info->ScsiStatus);
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printk("senselen:%d\n", cp->err_info->SenseLen);
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printk("cmd status:%d\n", cp->err_info->CommandStatus);
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printk("resid cnt:%d\n", cp->err_info->ResidualCnt);
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printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
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printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
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printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
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}
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#endif
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static int
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find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun)
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{
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/* finds an unused bus, target, lun for a new device */
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/* assumes h->scsi_ctlr->lock is held */
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int i, found=0;
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unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
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memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
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target_taken[SELF_SCSI_ID] = 1;
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for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++)
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target_taken[ccissscsi[h->ctlr].dev[i].target] = 1;
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for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) {
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if (!target_taken[i]) {
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*bus = 0; *target=i; *lun = 0; found=1;
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break;
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}
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}
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return (!found);
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}
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struct scsi2map {
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char scsi3addr[8];
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int bus, target, lun;
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};
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static int
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cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
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struct cciss_scsi_dev_t *device,
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struct scsi2map *added, int *nadded)
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{
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/* assumes h->scsi_ctlr->lock is held */
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int n = ccissscsi[h->ctlr].ndevices;
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struct cciss_scsi_dev_t *sd;
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int i, bus, target, lun;
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unsigned char addr1[8], addr2[8];
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if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
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dev_warn(&h->pdev->dev, "Too many devices, "
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"some will be inaccessible.\n");
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return -1;
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}
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bus = target = -1;
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lun = 0;
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/* Is this device a non-zero lun of a multi-lun device */
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/* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
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if (device->scsi3addr[4] != 0) {
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/* Search through our list and find the device which */
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/* has the same 8 byte LUN address, excepting byte 4. */
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/* Assign the same bus and target for this new LUN. */
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/* Use the logical unit number from the firmware. */
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memcpy(addr1, device->scsi3addr, 8);
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addr1[4] = 0;
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for (i = 0; i < n; i++) {
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sd = &ccissscsi[h->ctlr].dev[i];
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memcpy(addr2, sd->scsi3addr, 8);
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addr2[4] = 0;
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/* differ only in byte 4? */
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if (memcmp(addr1, addr2, 8) == 0) {
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bus = sd->bus;
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target = sd->target;
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lun = device->scsi3addr[4];
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break;
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}
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}
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}
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sd = &ccissscsi[h->ctlr].dev[n];
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if (lun == 0) {
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if (find_bus_target_lun(h,
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&sd->bus, &sd->target, &sd->lun) != 0)
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return -1;
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} else {
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sd->bus = bus;
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sd->target = target;
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sd->lun = lun;
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}
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added[*nadded].bus = sd->bus;
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added[*nadded].target = sd->target;
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added[*nadded].lun = sd->lun;
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(*nadded)++;
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memcpy(sd->scsi3addr, device->scsi3addr, 8);
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memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
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memcpy(sd->revision, device->revision, sizeof(sd->revision));
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memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
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sd->devtype = device->devtype;
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ccissscsi[h->ctlr].ndevices++;
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/* initially, (before registering with scsi layer) we don't
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know our hostno and we don't want to print anything first
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time anyway (the scsi layer's inquiries will show that info) */
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if (hostno != -1)
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dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
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|
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 */
|