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![FUJITA Tomonori](/assets/img/avatar_default.png)
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Mike Miller <Mike.Miller@hp.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
1503 lines
43 KiB
C
1503 lines
43 KiB
C
/*
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* Disk Array driver for Compaq SA53xx Controllers, SCSI Tape module
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* Copyright 2001 Compaq Computer Corporation
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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; either version 2 of the License, or
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* (at your option) any later version.
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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, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU 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., 675 Mass Ave, Cambridge, MA 02139, 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 <asm/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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/* some prototypes... */
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static int sendcmd(
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__u8 cmd,
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int ctlr,
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void *buff,
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size_t size,
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unsigned int use_unit_num, /* 0: address the controller,
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1: address logical volume log_unit,
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2: address is in scsi3addr */
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unsigned int log_unit,
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__u8 page_code,
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unsigned char *scsi3addr,
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int cmd_type);
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static int cciss_scsi_proc_info(
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struct Scsi_Host *sh,
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char *buffer, /* data buffer */
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char **start, /* where data in buffer starts */
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off_t offset, /* offset from start of imaginary file */
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int length, /* length of data in buffer */
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int func); /* 0 == read, 1 == write */
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static int cciss_scsi_queue_command (struct scsi_cmnd *cmd,
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void (* done)(struct scsi_cmnd *));
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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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.proc_info = cciss_scsi_proc_info,
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.queuecommand = cciss_scsi_queue_command,
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.can_queue = SCSI_CCISS_CAN_QUEUE,
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.this_id = 7,
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.sg_tablesize = MAXSGENTRIES,
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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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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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__u32 pad;
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};
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#pragma pack()
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#define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
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CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
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// plus two for init time usage
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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[CMD_STACK_SIZE];
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dma_addr_t cmd_pool_handle;
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int top;
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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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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(ctlr, flags) spin_lock_irqsave( \
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&(((struct cciss_scsi_adapter_data_t *) \
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hba[ctlr]->scsi_ctlr)->lock), flags);
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#define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \
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&(((struct cciss_scsi_adapter_data_t *) \
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hba[ctlr]->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 CCISS_LOCK(ctlr) */
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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 = (struct cciss_scsi_adapter_data_t *) 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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/* (__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 *cmd)
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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 CCISS_LOCK(ctlr) */
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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 = (struct cciss_scsi_adapter_data_t *) h->scsi_ctlr;
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stk = &sa->cmd_stack;
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if (stk->top >= CMD_STACK_SIZE) {
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printk("cciss: scsi_cmd_free called too many times.\n");
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BUG();
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}
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stk->top++;
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stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd;
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}
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static int
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scsi_cmd_stack_setup(int ctlr, 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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size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
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// pci_alloc_consistent guarantees 32-bit DMA address will
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// be used
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stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
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pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle);
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if (stk->pool == NULL) {
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printk("stk->pool is null\n");
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return -1;
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}
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for (i=0; i<CMD_STACK_SIZE; 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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}
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stk->top = CMD_STACK_SIZE-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(int ctlr)
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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 = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr;
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stk = &sa->cmd_stack;
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if (stk->top != CMD_STACK_SIZE-1) {
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printk( "cciss: %d scsi commands are still outstanding.\n",
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CMD_STACK_SIZE - stk->top);
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// BUG();
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printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk);
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}
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size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
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pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle);
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stk->pool = 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(int ctlr, 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 hba[ctlr]->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[ctlr].ndevices;i++)
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target_taken[ccissscsi[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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static int
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cciss_scsi_add_entry(int ctlr, int hostno,
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unsigned char *scsi3addr, int devtype)
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{
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/* assumes hba[ctlr]->scsi_ctlr->lock is held */
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int n = ccissscsi[ctlr].ndevices;
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struct cciss_scsi_dev_t *sd;
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if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
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printk("cciss%d: Too many devices, "
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"some will be inaccessible.\n", ctlr);
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return -1;
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}
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sd = &ccissscsi[ctlr].dev[n];
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if (find_bus_target_lun(ctlr, &sd->bus, &sd->target, &sd->lun) != 0)
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return -1;
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memcpy(&sd->scsi3addr[0], scsi3addr, 8);
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sd->devtype = devtype;
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ccissscsi[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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printk("cciss%d: %s device c%db%dt%dl%d added.\n",
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ctlr, scsi_device_type(sd->devtype), hostno,
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sd->bus, sd->target, sd->lun);
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return 0;
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}
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static void
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cciss_scsi_remove_entry(int ctlr, int hostno, int entry)
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{
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/* assumes hba[ctlr]->scsi_ctlr->lock is held */
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int i;
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struct cciss_scsi_dev_t sd;
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if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
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sd = ccissscsi[ctlr].dev[entry];
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for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++)
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ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1];
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ccissscsi[ctlr].ndevices--;
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printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
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ctlr, scsi_device_type(sd.devtype), hostno,
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sd.bus, sd.target, sd.lun);
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}
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|
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#define SCSI3ADDR_EQ(a,b) ( \
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(a)[7] == (b)[7] && \
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(a)[6] == (b)[6] && \
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(a)[5] == (b)[5] && \
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(a)[4] == (b)[4] && \
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(a)[3] == (b)[3] && \
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(a)[2] == (b)[2] && \
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(a)[1] == (b)[1] && \
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(a)[0] == (b)[0])
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static int
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adjust_cciss_scsi_table(int ctlr, int hostno,
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struct cciss_scsi_dev_t sd[], int nsds)
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{
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/* sd contains scsi3 addresses and devtypes, but
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bus target and lun are not filled in. This funciton
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takes what's in sd to be the current and adjusts
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ccissscsi[] to be in line with what's in sd. */
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int i,j, found, changes=0;
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struct cciss_scsi_dev_t *csd;
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unsigned long flags;
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CPQ_TAPE_LOCK(ctlr, flags);
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/* find any devices in ccissscsi[] that are not in
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sd[] and remove them from ccissscsi[] */
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i = 0;
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while(i<ccissscsi[ctlr].ndevices) {
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csd = &ccissscsi[ctlr].dev[i];
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found=0;
|
|
for (j=0;j<nsds;j++) {
|
|
if (SCSI3ADDR_EQ(sd[j].scsi3addr,
|
|
csd->scsi3addr)) {
|
|
if (sd[j].devtype == csd->devtype)
|
|
found=2;
|
|
else
|
|
found=1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found == 0) { /* device no longer present. */
|
|
changes++;
|
|
/* printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
|
|
ctlr, scsi_device_type(csd->devtype), hostno,
|
|
csd->bus, csd->target, csd->lun); */
|
|
cciss_scsi_remove_entry(ctlr, hostno, i);
|
|
/* note, i not incremented */
|
|
}
|
|
else if (found == 1) { /* device is different kind */
|
|
changes++;
|
|
printk("cciss%d: device c%db%dt%dl%d type changed "
|
|
"(device type now %s).\n",
|
|
ctlr, hostno, csd->bus, csd->target, csd->lun,
|
|
scsi_device_type(csd->devtype));
|
|
csd->devtype = sd[j].devtype;
|
|
i++; /* so just move along. */
|
|
} 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[ctlr].ndevices;j++) {
|
|
csd = &ccissscsi[ctlr].dev[j];
|
|
if (SCSI3ADDR_EQ(sd[i].scsi3addr,
|
|
csd->scsi3addr)) {
|
|
if (sd[i].devtype == csd->devtype)
|
|
found=2; /* found device */
|
|
else
|
|
found=1; /* found a bug. */
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
changes++;
|
|
if (cciss_scsi_add_entry(ctlr, hostno,
|
|
&sd[i].scsi3addr[0], sd[i].devtype) != 0)
|
|
break;
|
|
} else if (found == 1) {
|
|
/* should never happen... */
|
|
changes++;
|
|
printk("cciss%d: device unexpectedly changed type\n",
|
|
ctlr);
|
|
/* but if it does happen, we just ignore that device */
|
|
}
|
|
}
|
|
CPQ_TAPE_UNLOCK(ctlr, flags);
|
|
|
|
if (!changes)
|
|
printk("cciss%d: No device changes detected.\n", ctlr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr)
|
|
{
|
|
int i;
|
|
struct cciss_scsi_dev_t *sd;
|
|
unsigned long flags;
|
|
|
|
CPQ_TAPE_LOCK(ctlr, flags);
|
|
for (i=0;i<ccissscsi[ctlr].ndevices;i++) {
|
|
sd = &ccissscsi[ctlr].dev[i];
|
|
if (sd->bus == bus &&
|
|
sd->target == target &&
|
|
sd->lun == lun) {
|
|
memcpy(scsi3addr, &sd->scsi3addr[0], 8);
|
|
CPQ_TAPE_UNLOCK(ctlr, flags);
|
|
return 0;
|
|
}
|
|
}
|
|
CPQ_TAPE_UNLOCK(ctlr, flags);
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
cciss_scsi_setup(int cntl_num)
|
|
{
|
|
struct cciss_scsi_adapter_data_t * shba;
|
|
|
|
ccissscsi[cntl_num].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(cntl_num, shba) != 0) {
|
|
kfree(shba);
|
|
shba = NULL;
|
|
}
|
|
hba[cntl_num]->scsi_ctlr = (void *) shba;
|
|
return;
|
|
}
|
|
|
|
static void
|
|
complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
|
|
{
|
|
struct scsi_cmnd *cmd;
|
|
ctlr_info_t *ctlr;
|
|
ErrorInfo_struct *ei;
|
|
|
|
ei = cp->err_info;
|
|
|
|
/* First, see if it was a message rather than a command */
|
|
if (cp->Request.Type.Type == TYPE_MSG) {
|
|
cp->cmd_type = CMD_MSG_DONE;
|
|
return;
|
|
}
|
|
|
|
cmd = (struct scsi_cmnd *) cp->scsi_cmd;
|
|
ctlr = hba[cp->ctlr];
|
|
|
|
scsi_dma_unmap(cmd);
|
|
|
|
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)
|
|
{
|
|
#if 0
|
|
printk(KERN_WARNING "cciss: cmd %p "
|
|
"has SCSI Status = %x\n",
|
|
cp,
|
|
ei->ScsiStatus);
|
|
#endif
|
|
cmd->result |= (ei->ScsiStatus < 1);
|
|
}
|
|
else { /* scsi status is zero??? How??? */
|
|
|
|
/* 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:
|
|
printk(KERN_WARNING "cciss: cp %p has"
|
|
" completed with data overrun "
|
|
"reported\n", cp);
|
|
break;
|
|
case CMD_INVALID: {
|
|
/* print_bytes(cp, sizeof(*cp), 1, 0);
|
|
print_cmd(cp); */
|
|
/* 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:
|
|
printk(KERN_WARNING "cciss: cp %p has "
|
|
"protocol error \n", cp);
|
|
break;
|
|
case CMD_HARDWARE_ERR:
|
|
cmd->result = DID_ERROR << 16;
|
|
printk(KERN_WARNING "cciss: cp %p had "
|
|
" hardware error\n", cp);
|
|
break;
|
|
case CMD_CONNECTION_LOST:
|
|
cmd->result = DID_ERROR << 16;
|
|
printk(KERN_WARNING "cciss: cp %p had "
|
|
"connection lost\n", cp);
|
|
break;
|
|
case CMD_ABORTED:
|
|
cmd->result = DID_ABORT << 16;
|
|
printk(KERN_WARNING "cciss: cp %p was "
|
|
"aborted\n", cp);
|
|
break;
|
|
case CMD_ABORT_FAILED:
|
|
cmd->result = DID_ERROR << 16;
|
|
printk(KERN_WARNING "cciss: cp %p reports "
|
|
"abort failed\n", cp);
|
|
break;
|
|
case CMD_UNSOLICITED_ABORT:
|
|
cmd->result = DID_ABORT << 16;
|
|
printk(KERN_WARNING "cciss: cp %p aborted "
|
|
"do to an unsolicited abort\n", cp);
|
|
break;
|
|
case CMD_TIMEOUT:
|
|
cmd->result = DID_TIME_OUT << 16;
|
|
printk(KERN_WARNING "cciss: cp %p timedout\n",
|
|
cp);
|
|
break;
|
|
default:
|
|
cmd->result = DID_ERROR << 16;
|
|
printk(KERN_WARNING "cciss: cp %p returned "
|
|
"unknown status %x\n", cp,
|
|
ei->CommandStatus);
|
|
}
|
|
}
|
|
// printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel,
|
|
// cmd->target, cmd->lun);
|
|
cmd->scsi_done(cmd);
|
|
scsi_cmd_free(ctlr, cp);
|
|
}
|
|
|
|
static int
|
|
cciss_scsi_detect(int ctlr)
|
|
{
|
|
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;
|
|
|
|
((struct cciss_scsi_adapter_data_t *)
|
|
hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh;
|
|
sh->hostdata[0] = (unsigned long) hba[ctlr];
|
|
sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT];
|
|
sh->unique_id = sh->irq;
|
|
error = scsi_add_host(sh, &hba[ctlr]->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 *cp,
|
|
size_t buflen,
|
|
int data_direction)
|
|
{
|
|
u64bit addr64;
|
|
|
|
addr64.val32.lower = cp->SG[0].Addr.lower;
|
|
addr64.val32.upper = cp->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 *cp,
|
|
unsigned char *buf,
|
|
size_t buflen,
|
|
int data_direction)
|
|
{
|
|
__u64 addr64;
|
|
|
|
addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
|
|
cp->SG[0].Addr.lower =
|
|
(__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
|
|
cp->SG[0].Addr.upper =
|
|
(__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
|
|
cp->SG[0].Len = buflen;
|
|
cp->Header.SGList = (__u8) 1; /* no. SGs contig in this cmd */
|
|
cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
|
|
}
|
|
|
|
static int
|
|
cciss_scsi_do_simple_cmd(ctlr_info_t *c,
|
|
CommandList_struct *cp,
|
|
unsigned char *scsi3addr,
|
|
unsigned char *cdb,
|
|
unsigned char cdblen,
|
|
unsigned char *buf, int bufsize,
|
|
int direction)
|
|
{
|
|
unsigned long flags;
|
|
DECLARE_COMPLETION_ONSTACK(wait);
|
|
|
|
cp->cmd_type = CMD_IOCTL_PEND; // treat this like an ioctl
|
|
cp->scsi_cmd = NULL;
|
|
cp->Header.ReplyQueue = 0; // unused in simple mode
|
|
memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN));
|
|
cp->Header.Tag.lower = cp->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(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
|
|
memcpy(cp->Request.CDB, cdb, cdblen);
|
|
cp->Request.Timeout = 0;
|
|
cp->Request.CDBLen = cdblen;
|
|
cp->Request.Type.Type = TYPE_CMD;
|
|
cp->Request.Type.Attribute = ATTR_SIMPLE;
|
|
cp->Request.Type.Direction = direction;
|
|
|
|
/* Fill in the SG list and do dma mapping */
|
|
cciss_map_one(c->pdev, cp, (unsigned char *) buf,
|
|
bufsize, DMA_FROM_DEVICE);
|
|
|
|
cp->waiting = &wait;
|
|
|
|
/* Put the request on the tail of the request queue */
|
|
spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
|
|
addQ(&c->reqQ, cp);
|
|
c->Qdepth++;
|
|
start_io(c);
|
|
spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
|
|
|
|
wait_for_completion(&wait);
|
|
|
|
/* undo the dma mapping */
|
|
cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE);
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
cciss_scsi_interpret_error(CommandList_struct *cp)
|
|
{
|
|
ErrorInfo_struct *ei;
|
|
|
|
ei = cp->err_info;
|
|
switch(ei->CommandStatus)
|
|
{
|
|
case CMD_TARGET_STATUS:
|
|
printk(KERN_WARNING "cciss: cmd %p has "
|
|
"completed with errors\n", cp);
|
|
printk(KERN_WARNING "cciss: cmd %p "
|
|
"has SCSI Status = %x\n",
|
|
cp,
|
|
ei->ScsiStatus);
|
|
if (ei->ScsiStatus == 0)
|
|
printk(KERN_WARNING
|
|
"cciss: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. */
|
|
printk("UNDERRUN\n");
|
|
break;
|
|
case CMD_DATA_OVERRUN:
|
|
printk(KERN_WARNING "cciss: cp %p has"
|
|
" completed with data overrun "
|
|
"reported\n", cp);
|
|
break;
|
|
case CMD_INVALID: {
|
|
/* controller unfortunately reports SCSI passthru's */
|
|
/* to non-existent targets as invalid commands. */
|
|
printk(KERN_WARNING "cciss: cp %p is "
|
|
"reported invalid (probably means "
|
|
"target device no longer present)\n",
|
|
cp);
|
|
/* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
|
|
print_cmd(cp); */
|
|
}
|
|
break;
|
|
case CMD_PROTOCOL_ERR:
|
|
printk(KERN_WARNING "cciss: cp %p has "
|
|
"protocol error \n", cp);
|
|
break;
|
|
case CMD_HARDWARE_ERR:
|
|
/* cmd->result = DID_ERROR << 16; */
|
|
printk(KERN_WARNING "cciss: cp %p had "
|
|
" hardware error\n", cp);
|
|
break;
|
|
case CMD_CONNECTION_LOST:
|
|
printk(KERN_WARNING "cciss: cp %p had "
|
|
"connection lost\n", cp);
|
|
break;
|
|
case CMD_ABORTED:
|
|
printk(KERN_WARNING "cciss: cp %p was "
|
|
"aborted\n", cp);
|
|
break;
|
|
case CMD_ABORT_FAILED:
|
|
printk(KERN_WARNING "cciss: cp %p reports "
|
|
"abort failed\n", cp);
|
|
break;
|
|
case CMD_UNSOLICITED_ABORT:
|
|
printk(KERN_WARNING "cciss: cp %p aborted "
|
|
"do to an unsolicited abort\n", cp);
|
|
break;
|
|
case CMD_TIMEOUT:
|
|
printk(KERN_WARNING "cciss: cp %p timedout\n",
|
|
cp);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "cciss: cp %p returned "
|
|
"unknown status %x\n", cp,
|
|
ei->CommandStatus);
|
|
}
|
|
}
|
|
|
|
static int
|
|
cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr,
|
|
unsigned char *buf, unsigned char bufsize)
|
|
{
|
|
int rc;
|
|
CommandList_struct *cp;
|
|
char cdb[6];
|
|
ErrorInfo_struct *ei;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
|
|
cp = scsi_cmd_alloc(c);
|
|
spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
|
|
|
|
if (cp == NULL) { /* trouble... */
|
|
printk("cmd_alloc returned NULL!\n");
|
|
return -1;
|
|
}
|
|
|
|
ei = cp->err_info;
|
|
|
|
cdb[0] = CISS_INQUIRY;
|
|
cdb[1] = 0;
|
|
cdb[2] = 0;
|
|
cdb[3] = 0;
|
|
cdb[4] = bufsize;
|
|
cdb[5] = 0;
|
|
rc = cciss_scsi_do_simple_cmd(c, cp, 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(cp);
|
|
rc = -1;
|
|
}
|
|
spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
|
|
scsi_cmd_free(c, cp);
|
|
spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
cciss_scsi_do_report_phys_luns(ctlr_info_t *c,
|
|
ReportLunData_struct *buf, int bufsize)
|
|
{
|
|
int rc;
|
|
CommandList_struct *cp;
|
|
unsigned char cdb[12];
|
|
unsigned char scsi3addr[8];
|
|
ErrorInfo_struct *ei;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
|
|
cp = scsi_cmd_alloc(c);
|
|
spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
|
|
if (cp == 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(c, cp, scsi3addr,
|
|
cdb, 12,
|
|
(unsigned char *) buf,
|
|
bufsize, XFER_READ);
|
|
|
|
if (rc != 0) return rc; /* something went wrong */
|
|
|
|
ei = cp->err_info;
|
|
if (ei->CommandStatus != 0 &&
|
|
ei->CommandStatus != CMD_DATA_UNDERRUN) {
|
|
cciss_scsi_interpret_error(cp);
|
|
rc = -1;
|
|
}
|
|
spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
|
|
scsi_cmd_free(c, cp);
|
|
spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
cciss_update_non_disk_devices(int cntl_num, 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];
|
|
ctlr_info_t *c;
|
|
__u32 num_luns=0;
|
|
unsigned char *ch;
|
|
/* unsigned char found[CCISS_MAX_SCSI_DEVS_PER_HBA]; */
|
|
struct cciss_scsi_dev_t currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
|
|
int ncurrent=0;
|
|
int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
|
|
int i;
|
|
|
|
c = (ctlr_info_t *) hba[cntl_num];
|
|
ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
|
|
if (ld_buff == NULL) {
|
|
printk(KERN_ERR "cciss: out of memory\n");
|
|
return;
|
|
}
|
|
inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
|
|
if (inq_buff == NULL) {
|
|
printk(KERN_ERR "cciss: out of memory\n");
|
|
kfree(ld_buff);
|
|
return;
|
|
}
|
|
|
|
if (cciss_scsi_do_report_phys_luns(c, 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++)
|
|
{
|
|
int devtype;
|
|
|
|
/* 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(hba[cntl_num], scsi3addr, inq_buff,
|
|
(unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
|
|
/* Inquiry failed (msg printed already) */
|
|
devtype = 0; /* so we will skip this device. */
|
|
} else /* what kind of device is this? */
|
|
devtype = (inq_buff[0] & 0x1f);
|
|
|
|
switch (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", cntl_num,
|
|
scsi_device_type(devtype));
|
|
break;
|
|
}
|
|
memcpy(¤tsd[ncurrent].scsi3addr[0],
|
|
&scsi3addr[0], 8);
|
|
currentsd[ncurrent].devtype = devtype;
|
|
currentsd[ncurrent].bus = -1;
|
|
currentsd[ncurrent].target = -1;
|
|
currentsd[ncurrent].lun = -1;
|
|
ncurrent++;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent);
|
|
out:
|
|
kfree(inq_buff);
|
|
kfree(ld_buff);
|
|
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(int ctlr, int hostno, char *buffer, int length)
|
|
{
|
|
int arg_len;
|
|
|
|
if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
|
|
cciss_update_non_disk_devices(ctlr, hostno);
|
|
else
|
|
return -EINVAL;
|
|
return length;
|
|
}
|
|
|
|
|
|
static int
|
|
cciss_scsi_proc_info(struct Scsi_Host *sh,
|
|
char *buffer, /* data buffer */
|
|
char **start, /* where data in buffer starts */
|
|
off_t offset, /* offset from start of imaginary file */
|
|
int length, /* length of data in buffer */
|
|
int func) /* 0 == read, 1 == write */
|
|
{
|
|
|
|
int buflen, datalen;
|
|
ctlr_info_t *ci;
|
|
int i;
|
|
int cntl_num;
|
|
|
|
|
|
ci = (ctlr_info_t *) sh->hostdata[0];
|
|
if (ci == NULL) /* This really shouldn't ever happen. */
|
|
return -EINVAL;
|
|
|
|
cntl_num = ci->ctlr; /* Get our index into the hba[] array */
|
|
|
|
if (func == 0) { /* User is reading from /proc/scsi/ciss*?/?* */
|
|
buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
|
|
cntl_num, 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[cntl_num].ndevices;i++) {
|
|
struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i];
|
|
buflen += sprintf(&buffer[buflen], "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]);
|
|
}
|
|
datalen = buflen - offset;
|
|
if (datalen < 0) { /* they're reading past EOF. */
|
|
datalen = 0;
|
|
*start = buffer+buflen;
|
|
} else
|
|
*start = buffer + offset;
|
|
return(datalen);
|
|
} else /* User is writing to /proc/scsi/cciss*?/?* ... */
|
|
return cciss_scsi_user_command(cntl_num, sh->host_no,
|
|
buffer, length);
|
|
}
|
|
|
|
/* 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, cp. */
|
|
|
|
static void
|
|
cciss_scatter_gather(struct pci_dev *pdev,
|
|
CommandList_struct *cp,
|
|
struct scsi_cmnd *cmd)
|
|
{
|
|
unsigned int len;
|
|
struct scatterlist *sg;
|
|
__u64 addr64;
|
|
int use_sg, i;
|
|
|
|
BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES);
|
|
|
|
use_sg = scsi_dma_map(cmd);
|
|
if (use_sg) { /* not too many addrs? */
|
|
scsi_for_each_sg(cmd, sg, use_sg, i) {
|
|
addr64 = (__u64) sg_dma_address(sg);
|
|
len = sg_dma_len(sg);
|
|
cp->SG[i].Addr.lower =
|
|
(__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
|
|
cp->SG[i].Addr.upper =
|
|
(__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
|
|
cp->SG[i].Len = len;
|
|
cp->SG[i].Ext = 0; // we are not chaining
|
|
}
|
|
}
|
|
|
|
cp->Header.SGList = (__u8) use_sg; /* no. SGs contig in this cmd */
|
|
cp->Header.SGTotal = (__u16) use_sg; /* total sgs in this cmd list */
|
|
return;
|
|
}
|
|
|
|
|
|
static int
|
|
cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
|
|
{
|
|
ctlr_info_t **c;
|
|
int ctlr, rc;
|
|
unsigned char scsi3addr[8];
|
|
CommandList_struct *cp;
|
|
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?)
|
|
c = (ctlr_info_t **) &cmd->device->host->hostdata[0];
|
|
ctlr = (*c)->ctlr;
|
|
|
|
rc = lookup_scsi3addr(ctlr, 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;
|
|
}
|
|
|
|
/* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n",
|
|
cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/
|
|
// printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel,
|
|
// cmd->target, cmd->lun);
|
|
|
|
/* Ok, we have a reasonable scsi nexus, so send the cmd down, and
|
|
see what the device thinks of it. */
|
|
|
|
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
|
|
cp = scsi_cmd_alloc(*c);
|
|
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
|
|
if (cp == NULL) { /* trouble... */
|
|
printk("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 cp in case we have to abort it
|
|
cmd->host_scribble = (unsigned char *) cp;
|
|
|
|
cp->cmd_type = CMD_SCSI;
|
|
cp->scsi_cmd = cmd;
|
|
cp->Header.ReplyQueue = 0; // unused in simple mode
|
|
memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
|
|
cp->Header.Tag.lower = cp->busaddr; // Use k. address of cmd as tag
|
|
|
|
// Fill in the request block...
|
|
|
|
cp->Request.Timeout = 0;
|
|
memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
|
|
BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB));
|
|
cp->Request.CDBLen = cmd->cmd_len;
|
|
memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len);
|
|
cp->Request.Type.Type = TYPE_CMD;
|
|
cp->Request.Type.Attribute = ATTR_SIMPLE;
|
|
switch(cmd->sc_data_direction)
|
|
{
|
|
case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break;
|
|
case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break;
|
|
case DMA_NONE: cp->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() )
|
|
|
|
cp->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:
|
|
printk("cciss: unknown data direction: %d\n",
|
|
cmd->sc_data_direction);
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
cciss_scatter_gather((*c)->pdev, cp, cmd); // Fill the SG list
|
|
|
|
/* Put the request on the tail of the request queue */
|
|
|
|
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
|
|
addQ(&(*c)->reqQ, cp);
|
|
(*c)->Qdepth++;
|
|
start_io(*c);
|
|
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
|
|
|
|
/* the cmd'll come back via intr handler in complete_scsi_command() */
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
cciss_unregister_scsi(int ctlr)
|
|
{
|
|
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(CCISS_LOCK(ctlr), flags);
|
|
sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr;
|
|
stk = &sa->cmd_stack;
|
|
|
|
/* if we weren't ever actually registered, don't unregister */
|
|
if (sa->registered) {
|
|
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
|
|
scsi_remove_host(sa->scsi_host);
|
|
scsi_host_put(sa->scsi_host);
|
|
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
|
|
}
|
|
|
|
/* set scsi_host to NULL so our detect routine will
|
|
find us on register */
|
|
sa->scsi_host = NULL;
|
|
scsi_cmd_stack_free(ctlr);
|
|
kfree(sa);
|
|
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
|
|
}
|
|
|
|
static int
|
|
cciss_register_scsi(int ctlr)
|
|
{
|
|
unsigned long flags;
|
|
|
|
CPQ_TAPE_LOCK(ctlr, flags);
|
|
|
|
/* Since this is really a block driver, the SCSI core may not be
|
|
initialized at init time, in which case, calling scsi_register_host
|
|
would hang. Instead, we do it later, via /proc filesystem
|
|
and rc scripts, when we know SCSI core is good to go. */
|
|
|
|
/* Only register if SCSI devices are detected. */
|
|
if (ccissscsi[ctlr].ndevices != 0) {
|
|
((struct cciss_scsi_adapter_data_t *)
|
|
hba[ctlr]->scsi_ctlr)->registered = 1;
|
|
CPQ_TAPE_UNLOCK(ctlr, flags);
|
|
return cciss_scsi_detect(ctlr);
|
|
}
|
|
CPQ_TAPE_UNLOCK(ctlr, flags);
|
|
printk(KERN_INFO
|
|
"cciss%d: No appropriate SCSI device detected, "
|
|
"SCSI subsystem not engaged.\n", ctlr);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
cciss_engage_scsi(int ctlr)
|
|
{
|
|
struct cciss_scsi_adapter_data_t *sa;
|
|
struct cciss_scsi_cmd_stack_t *stk;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
|
|
sa = (struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr;
|
|
stk = &sa->cmd_stack;
|
|
|
|
if (((struct cciss_scsi_adapter_data_t *)
|
|
hba[ctlr]->scsi_ctlr)->registered) {
|
|
printk("cciss%d: SCSI subsystem already engaged.\n", ctlr);
|
|
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
|
|
return ENXIO;
|
|
}
|
|
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
|
|
cciss_update_non_disk_devices(ctlr, -1);
|
|
cciss_register_scsi(ctlr);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
cciss_proc_tape_report(int ctlr, unsigned char *buffer, off_t *pos, off_t *len)
|
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{
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unsigned long flags;
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int size;
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*pos = *pos -1; *len = *len - 1; // cut off the last trailing newline
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CPQ_TAPE_LOCK(ctlr, flags);
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size = sprintf(buffer + *len,
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"Sequential access devices: %d\n\n",
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ccissscsi[ctlr].ndevices);
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CPQ_TAPE_UNLOCK(ctlr, flags);
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*pos += size; *len += size;
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}
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/* Need at least one of these error handlers to keep ../scsi/hosts.c from
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* complaining. Doing a host- or bus-reset can't do anything good here.
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* Despite what it might say in scsi_error.c, there may well be commands
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* on the controller, as the cciss driver registers twice, once as a block
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* device for the logical drives, and once as a scsi device, for any tape
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* drives. So we know there are no commands out on the tape drives, but we
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* don't know there are no commands on the controller, and it is likely
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* that there probably are, as the cciss block device is most commonly used
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* as a boot device (embedded controller on HP/Compaq systems.)
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*/
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static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
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{
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int rc;
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CommandList_struct *cmd_in_trouble;
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ctlr_info_t **c;
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int ctlr;
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/* find the controller to which the command to be aborted was sent */
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c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0];
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if (c == NULL) /* paranoia */
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return FAILED;
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ctlr = (*c)->ctlr;
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printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr);
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/* find the command that's giving us trouble */
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cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
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if (cmd_in_trouble == NULL) { /* paranoia */
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return FAILED;
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}
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/* send a reset to the SCSI LUN which the command was sent to */
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rc = sendcmd(CCISS_RESET_MSG, ctlr, NULL, 0, 2, 0, 0,
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(unsigned char *) &cmd_in_trouble->Header.LUN.LunAddrBytes[0],
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TYPE_MSG);
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/* sendcmd turned off interrputs on the board, turn 'em back on. */
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(*c)->access.set_intr_mask(*c, CCISS_INTR_ON);
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if (rc == 0)
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return SUCCESS;
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printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr);
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return FAILED;
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}
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static int cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
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{
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int rc;
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CommandList_struct *cmd_to_abort;
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ctlr_info_t **c;
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|
int ctlr;
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|
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/* find the controller to which the command to be aborted was sent */
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c = (ctlr_info_t **) &scsicmd->device->host->hostdata[0];
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if (c == NULL) /* paranoia */
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return FAILED;
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ctlr = (*c)->ctlr;
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printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr);
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|
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/* find the command to be aborted */
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cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
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if (cmd_to_abort == NULL) /* paranoia */
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return FAILED;
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rc = sendcmd(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag,
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|
0, 2, 0, 0,
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(unsigned char *) &cmd_to_abort->Header.LUN.LunAddrBytes[0],
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TYPE_MSG);
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/* sendcmd turned off interrputs on the board, turn 'em back on. */
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(*c)->access.set_intr_mask(*c, CCISS_INTR_ON);
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|
if (rc == 0)
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return SUCCESS;
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return FAILED;
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|
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|
}
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|
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#else /* no CONFIG_CISS_SCSI_TAPE */
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/* If no tape support, then these become defined out of existence */
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#define cciss_scsi_setup(cntl_num)
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#define cciss_unregister_scsi(ctlr)
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|
#define cciss_register_scsi(ctlr)
|
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#define cciss_proc_tape_report(ctlr, buffer, pos, len)
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|
|
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#endif /* CONFIG_CISS_SCSI_TAPE */
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