ipr.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 2,336 行 · 第 1/5 页

/*
 * ipr.c -- driver for IBM Power Linux RAID adapters
 *
 * Written By: Brian King <[e-mail]>, IBM Corporation
 *
 * Copyright (C) 2003, 2004 IBM Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/*
 * Notes:
 *
 * This driver is used to control the following SCSI adapters:
 *
 * IBM iSeries: 5702, 5703, 2780, 5709, 570A, 570B
 *
 * IBM pSeries: PCI-X Dual Channel Ultra 320 SCSI RAID Adapter
 *              PCI-X Dual Channel Ultra 320 SCSI Adapter
 *              PCI-X Dual Channel Ultra 320 SCSI RAID Enablement Card
 *              Embedded SCSI adapter on p615 and p655 systems
 *
 * Supported Hardware Features:
 *	- Ultra 320 SCSI controller
 *	- PCI-X host interface
 *	- Embedded PowerPC RISC Processor and Hardware XOR DMA Engine
 *	- Non-Volatile Write Cache
 *	- Supports attachment of non-RAID disks, tape, and optical devices
 *	- RAID Levels 0, 5, 10
 *	- Hot spare
 *	- Background Parity Checking
 *	- Background Data Scrubbing
 *	- Ability to increase the capacity of an existing RAID 5 disk array
 *		by adding disks
 *
 * Driver Features:
 *	- Tagged command queuing
 *	- Adapter microcode download
 *	- PCI hot plug
 *	- SCSI device hot plug
 *
 */

#include <linux/config.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/wait.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/processor.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_request.h>
#include "ipr.h"

/*
 *   Global Data
 */
static struct list_head ipr_ioa_head = LIST_HEAD_INIT(ipr_ioa_head);
static unsigned int ipr_log_level = IPR_DEFAULT_LOG_LEVEL;
static unsigned int ipr_max_speed = 1;
static int ipr_testmode = 0;
static spinlock_t ipr_driver_lock = SPIN_LOCK_UNLOCKED;

/* This table describes the differences between DMA controller chips */
static const struct ipr_chip_cfg_t ipr_chip_cfg[] = {
	{ /* Gemstone and Citrine */
		.mailbox = 0x0042C,
		.cache_line_size = 0x20,
		{
			.set_interrupt_mask_reg = 0x0022C,
			.clr_interrupt_mask_reg = 0x00230,
			.sense_interrupt_mask_reg = 0x0022C,
			.clr_interrupt_reg = 0x00228,
			.sense_interrupt_reg = 0x00224,
			.ioarrin_reg = 0x00404,
			.sense_uproc_interrupt_reg = 0x00214,
			.set_uproc_interrupt_reg = 0x00214,
			.clr_uproc_interrupt_reg = 0x00218
		}
	},
	{ /* Snipe */
		.mailbox = 0x0052C,
		.cache_line_size = 0x20,
		{
			.set_interrupt_mask_reg = 0x00288,
			.clr_interrupt_mask_reg = 0x0028C,
			.sense_interrupt_mask_reg = 0x00288,
			.clr_interrupt_reg = 0x00284,
			.sense_interrupt_reg = 0x00280,
			.ioarrin_reg = 0x00504,
			.sense_uproc_interrupt_reg = 0x00290,
			.set_uproc_interrupt_reg = 0x00290,
			.clr_uproc_interrupt_reg = 0x00294
		}
	},
};

static int ipr_max_bus_speeds [] = {
	IPR_80MBs_SCSI_RATE, IPR_U160_SCSI_RATE, IPR_U320_SCSI_RATE
};

MODULE_AUTHOR("Brian King <[e-mail]>");
MODULE_DESCRIPTION("IBM Power RAID SCSI Adapter Driver");
module_param_named(max_speed, ipr_max_speed, uint, 0);
MODULE_PARM_DESC(max_speed, "Maximum bus speed (0-2). Default: 1=U160. Speeds: 0=80 MB/s, 1=U160, 2=U320");
module_param_named(log_level, ipr_log_level, uint, 0);
MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver");
module_param_named(testmode, ipr_testmode, int, 0);
MODULE_PARM_DESC(testmode, "DANGEROUS!!! Allows unsupported configurations");
MODULE_LICENSE("GPL");
MODULE_VERSION(IPR_DRIVER_VERSION);

static const char *ipr_gpdd_dev_end_states[] = {
	"Command complete",
	"Terminated by host",
	"Terminated by device reset",
	"Terminated by bus reset",
	"Unknown",
	"Command not started"
};

static const char *ipr_gpdd_dev_bus_phases[] = {
	"Bus free",
	"Arbitration",
	"Selection",
	"Message out",
	"Command",
	"Message in",
	"Data out",
	"Data in",
	"Status",
	"Reselection",
	"Unknown"
};

/*  A constant array of IOASCs/URCs/Error Messages */
static const
struct ipr_error_table_t ipr_error_table[] = {
	{0x00000000, 1, 1,
	"8155: An unknown error was received"},
	{0x00330000, 0, 0,
	"Soft underlength error"},
	{0x005A0000, 0, 0,
	"Command to be cancelled not found"},
	{0x00808000, 0, 0,
	"Qualified success"},
	{0x01080000, 1, 1,
	"FFFE: Soft device bus error recovered by the IOA"},
	{0x01170600, 0, 1,
	"FFF9: Device sector reassign successful"},
	{0x01170900, 0, 1,
	"FFF7: Media error recovered by device rewrite procedures"},
	{0x01180200, 0, 1,
	"7001: IOA sector reassignment successful"},
	{0x01180500, 0, 1,
	"FFF9: Soft media error. Sector reassignment recommended"},
	{0x01180600, 0, 1,
	"FFF7: Media error recovered by IOA rewrite procedures"},
	{0x01418000, 0, 1,
	"FF3D: Soft PCI bus error recovered by the IOA"},
	{0x01440000, 1, 1,
	"FFF6: Device hardware error recovered by the IOA"},
	{0x01448100, 0, 1,
	"FFF6: Device hardware error recovered by the device"},
	{0x01448200, 1, 1,
	"FF3D: Soft IOA error recovered by the IOA"},
	{0x01448300, 0, 1,
	"FFFA: Undefined device response recovered by the IOA"},
	{0x014A0000, 1, 1,
	"FFF6: Device bus error, message or command phase"},
	{0x015D0000, 0, 1,
	"FFF6: Failure prediction threshold exceeded"},
	{0x015D9200, 0, 1,
	"8009: Impending cache battery pack failure"},
	{0x02040400, 0, 0,
	"34FF: Disk device format in progress"},
	{0x023F0000, 0, 0,
	"Synchronization required"},
	{0x024E0000, 0, 0,
	"No ready, IOA shutdown"},
	{0x025A0000, 0, 0,
	"Not ready, IOA has been shutdown"},
	{0x02670100, 0, 1,
	"3020: Storage subsystem configuration error"},
	{0x03110B00, 0, 0,
	"FFF5: Medium error, data unreadable, recommend reassign"},
	{0x03110C00, 0, 0,
	"7000: Medium error, data unreadable, do not reassign"},
	{0x03310000, 0, 1,
	"FFF3: Disk media format bad"},
	{0x04050000, 0, 1,
	"3002: Addressed device failed to respond to selection"},
	{0x04080000, 1, 1,
	"3100: Device bus error"},
	{0x04080100, 0, 1,
	"3109: IOA timed out a device command"},
	{0x04088000, 0, 0,
	"3120: SCSI bus is not operational"},
	{0x04118000, 0, 1,
	"9000: IOA reserved area data check"},
	{0x04118100, 0, 1,
	"9001: IOA reserved area invalid data pattern"},
	{0x04118200, 0, 1,
	"9002: IOA reserved area LRC error"},
	{0x04320000, 0, 1,
	"102E: Out of alternate sectors for disk storage"},
	{0x04330000, 1, 1,
	"FFF4: Data transfer underlength error"},
	{0x04338000, 1, 1,
	"FFF4: Data transfer overlength error"},
	{0x043E0100, 0, 1,
	"3400: Logical unit failure"},
	{0x04408500, 0, 1,
	"FFF4: Device microcode is corrupt"},
	{0x04418000, 1, 1,
	"8150: PCI bus error"},
	{0x04430000, 1, 0,
	"Unsupported device bus message received"},
	{0x04440000, 1, 1,
	"FFF4: Disk device problem"},
	{0x04448200, 1, 1,
	"8150: Permanent IOA failure"},
	{0x04448300, 0, 1,
	"3010: Disk device returned wrong response to IOA"},
	{0x04448400, 0, 1,
	"8151: IOA microcode error"},
	{0x04448500, 0, 0,
	"Device bus status error"},
	{0x04448600, 0, 1,
	"8157: IOA error requiring IOA reset to recover"},
	{0x04490000, 0, 0,
	"Message reject received from the device"},
	{0x04449200, 0, 1,
	"8008: A permanent cache battery pack failure occurred"},
	{0x0444A000, 0, 1,
	"9090: Disk unit has been modified after the last known status"},
	{0x0444A200, 0, 1,
	"9081: IOA detected device error"},
	{0x0444A300, 0, 1,
	"9082: IOA detected device error"},
	{0x044A0000, 1, 1,
	"3110: Device bus error, message or command phase"},
	{0x04670400, 0, 1,
	"9091: Incorrect hardware configuration change has been detected"},
	{0x046E0000, 0, 1,
	"FFF4: Command to logical unit failed"},
	{0x05240000, 1, 0,
	"Illegal request, invalid request type or request packet"},
	{0x05250000, 0, 0,
	"Illegal request, invalid resource handle"},
	{0x05260000, 0, 0,
	"Illegal request, invalid field in parameter list"},
	{0x05260100, 0, 0,
	"Illegal request, parameter not supported"},
	{0x05260200, 0, 0,
	"Illegal request, parameter value invalid"},
	{0x052C0000, 0, 0,
	"Illegal request, command sequence error"},
	{0x06040500, 0, 1,
	"9031: Array protection temporarily suspended, protection resuming"},
	{0x06040600, 0, 1,
	"9040: Array protection temporarily suspended, protection resuming"},
	{0x06290000, 0, 1,
	"FFFB: SCSI bus was reset"},
	{0x06290500, 0, 0,
	"FFFE: SCSI bus transition to single ended"},
	{0x06290600, 0, 0,
	"FFFE: SCSI bus transition to LVD"},
	{0x06298000, 0, 1,
	"FFFB: SCSI bus was reset by another initiator"},
	{0x063F0300, 0, 1,
	"3029: A device replacement has occurred"},
	{0x064C8000, 0, 1,
	"9051: IOA cache data exists for a missing or failed device"},
	{0x06670100, 0, 1,
	"9025: Disk unit is not supported at its physical location"},
	{0x06670600, 0, 1,
	"3020: IOA detected a SCSI bus configuration error"},
	{0x06678000, 0, 1,
	"3150: SCSI bus configuration error"},
	{0x06690200, 0, 1,
	"9041: Array protection temporarily suspended"},
	{0x066B0200, 0, 1,
	"9030: Array no longer protected due to missing or failed disk unit"},
	{0x07270000, 0, 0,
	"Failure due to other device"},
	{0x07278000, 0, 1,
	"9008: IOA does not support functions expected by devices"},
	{0x07278100, 0, 1,
	"9010: Cache data associated with attached devices cannot be found"},
	{0x07278200, 0, 1,
	"9011: Cache data belongs to devices other than those attached"},
	{0x07278400, 0, 1,
	"9020: Array missing 2 or more devices with only 1 device present"},
	{0x07278500, 0, 1,
	"9021: Array missing 2 or more devices with 2 or more devices present"},
	{0x07278600, 0, 1,
	"9022: Exposed array is missing a required device"},
	{0x07278700, 0, 1,
	"9023: Array member(s) not at required physical locations"},
	{0x07278800, 0, 1,
	"9024: Array not functional due to present hardware configuration"},
	{0x07278900, 0, 1,
	"9026: Array not functional due to present hardware configuration"},
	{0x07278A00, 0, 1,
	"9027: Array is missing a device and parity is out of sync"},
	{0x07278B00, 0, 1,
	"9028: Maximum number of arrays already exist"},
	{0x07278C00, 0, 1,
	"9050: Required cache data cannot be located for a disk unit"},
	{0x07278D00, 0, 1,
	"9052: Cache data exists for a device that has been modified"},
	{0x07278F00, 0, 1,
	"9054: IOA resources not available due to previous problems"},
	{0x07279100, 0, 1,
	"9092: Disk unit requires initialization before use"},
	{0x07279200, 0, 1,
	"9029: Incorrect hardware configuration change has been detected"},
	{0x07279600, 0, 1,
	"9060: One or more disk pairs are missing from an array"},
	{0x07279700, 0, 1,
	"9061: One or more disks are missing from an array"},
	{0x07279800, 0, 1,
	"9062: One or more disks are missing from an array"},
	{0x07279900, 0, 1,
	"9063: Maximum number of functional arrays has been exceeded"},
	{0x0B260000, 0, 0,
	"Aborted command, invalid descriptor"},
	{0x0B5A0000, 0, 0,
	"Command terminated by host"}
};

static const struct ipr_ses_table_entry ipr_ses_table[] = {
	{ "2104-DL1        ", "XXXXXXXXXXXXXXXX", 80 },
	{ "2104-TL1        ", "XXXXXXXXXXXXXXXX", 80 },
	{ "HSBP07M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 7 slot */
	{ "HSBP05M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 5 slot */
	{ "HSBP05M S U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Bowtie */
	{ "HSBP06E ASU2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* MartinFenning */
	{ "2104-DU3        ", "XXXXXXXXXXXXXXXX", 160 },
	{ "2104-TU3        ", "XXXXXXXXXXXXXXXX", 160 },
	{ "HSBP04C RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
	{ "HSBP06E RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
	{ "St  V1S2        ", "XXXXXXXXXXXXXXXX", 160 },
	{ "HSBPD4M  PU3SCSI", "XXXXXXX*XXXXXXXX", 160 },
	{ "VSBPD1H   U3SCSI", "XXXXXXX*XXXXXXXX", 160 }
};

/*
 *  Function Prototypes
 */
static int ipr_reset_alert(struct ipr_cmnd *);
static void ipr_process_ccn(struct ipr_cmnd *);
static void ipr_process_error(struct ipr_cmnd *);
static void ipr_reset_ioa_job(struct ipr_cmnd *);
static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *,
				   enum ipr_shutdown_type);

#ifdef CONFIG_SCSI_IPR_TRACE
/**
 * ipr_trc_hook - Add a trace entry to the driver trace
 * @ipr_cmd:	ipr command struct
 * @type:		trace type
 * @add_data:	additional data
 *
 * Return value:
 * 	none
 **/
static void ipr_trc_hook(struct ipr_cmnd *ipr_cmd,
			 u8 type, u32 add_data)
{
	struct ipr_trace_entry *trace_entry;
	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;

	trace_entry = &ioa_cfg->trace[ioa_cfg->trace_index++];
	trace_entry->time = jiffies;
	trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
	trace_entry->type = type;
	trace_entry->cmd_index = ipr_cmd->cmd_index;
	trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
	trace_entry->u.add_data = add_data;
}
#else
#define ipr_trc_hook(ipr_cmd, type, add_data) do { } while(0)
#endif

/**
 * ipr_reinit_ipr_cmnd - Re-initialize an IPR Cmnd block for reuse
 * @ipr_cmd:	ipr command struct
 *
 * Return value:
 * 	none
 **/
static void ipr_reinit_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
{
	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
	struct ipr_ioasa *ioasa = &ipr_cmd->ioasa;

	memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
	ioarcb->write_data_transfer_length = 0;
	ioarcb->read_data_transfer_length = 0;
	ioarcb->write_ioadl_len = 0;
	ioarcb->read_ioadl_len = 0;
	ioasa->ioasc = 0;
	ioasa->residual_data_len = 0;

	ipr_cmd->scsi_cmd = NULL;
	ipr_cmd->sense_buffer[0] = 0;
	ipr_cmd->dma_use_sg = 0;
}

/**
 * ipr_init_ipr_cmnd - Initialize an IPR Cmnd block
 * @ipr_cmd:	ipr command struct
 *
 * Return value:
 * 	none
 **/
static void ipr_init_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
{
	ipr_reinit_ipr_cmnd(ipr_cmd);
	ipr_cmd->u.scratch = 0;
	ipr_cmd->sibling = NULL;
	init_timer(&ipr_cmd->timer);
}

/**
 * ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block
 * @ioa_cfg:	ioa config struct
 *
 * Return value:
 * 	pointer to ipr command struct
 **/
static
struct ipr_cmnd *ipr_get_free_ipr_cmnd(struct ipr_ioa_cfg *ioa_cfg)
{
	struct ipr_cmnd *ipr_cmd;