diff options
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym53c8xx.h')
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym53c8xx.h | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym53c8xx.h b/drivers/scsi/sym53c8xx_2/sym53c8xx.h new file mode 100644 index 00000000000..48110376972 --- /dev/null +++ b/drivers/scsi/sym53c8xx_2/sym53c8xx.h @@ -0,0 +1,217 @@ +/* + * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family + * of PCI-SCSI IO processors. + * + * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr> + * + * This driver is derived from the Linux sym53c8xx driver. + * Copyright (C) 1998-2000 Gerard Roudier + * + * The sym53c8xx driver is derived from the ncr53c8xx driver that had been + * a port of the FreeBSD ncr driver to Linux-1.2.13. + * + * The original ncr driver has been written for 386bsd and FreeBSD by + * Wolfgang Stanglmeier <wolf@cologne.de> + * Stefan Esser <se@mi.Uni-Koeln.de> + * Copyright (C) 1994 Wolfgang Stanglmeier + * + * Other major contributions: + * + * NVRAM detection and reading. + * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk> + * + *----------------------------------------------------------------------------- + * + * 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 + */ + +#ifndef SYM53C8XX_H +#define SYM53C8XX_H + +#include <linux/config.h> + +/* + * DMA addressing mode. + * + * 0 : 32 bit addressing for all chips. + * 1 : 40 bit addressing when supported by chip. + * 2 : 64 bit addressing when supported by chip, + * limited to 16 segments of 4 GB -> 64 GB max. + */ +#define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE + +/* + * NVRAM support. + */ +#if 1 +#define SYM_CONF_NVRAM_SUPPORT (1) +#endif + +/* + * These options are not tunable from 'make config' + */ +#if 1 +#define SYM_LINUX_PROC_INFO_SUPPORT +#define SYM_LINUX_USER_COMMAND_SUPPORT +#define SYM_LINUX_USER_INFO_SUPPORT +#define SYM_LINUX_DEBUG_CONTROL_SUPPORT +#endif + +/* + * Also handle old NCR chips if not (0). + */ +#define SYM_CONF_GENERIC_SUPPORT (1) + +/* + * Allow tags from 2 to 256, default 8 + */ +#ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS +#define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8) +#endif + +#if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2 +#define SYM_CONF_MAX_TAG (2) +#elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256 +#define SYM_CONF_MAX_TAG (256) +#else +#define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS +#endif + +#ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS +#define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG +#endif + +/* + * Anyway, we configure the driver for at least 64 tags per LUN. :) + */ +#if SYM_CONF_MAX_TAG <= 64 +#define SYM_CONF_MAX_TAG_ORDER (6) +#elif SYM_CONF_MAX_TAG <= 128 +#define SYM_CONF_MAX_TAG_ORDER (7) +#else +#define SYM_CONF_MAX_TAG_ORDER (8) +#endif + +/* + * Max number of SG entries. + */ +#define SYM_CONF_MAX_SG (96) + +/* + * Driver setup structure. + * + * This structure is initialized from linux config options. + * It can be overridden at boot-up by the boot command line. + */ +struct sym_driver_setup { + u_short max_tag; + u_char burst_order; + u_char scsi_led; + u_char scsi_diff; + u_char irq_mode; + u_char scsi_bus_check; + u_char host_id; + + u_char verbose; + u_char settle_delay; + u_char use_nvram; + u_long excludes[8]; + char tag_ctrl[100]; +}; + +#define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag +#define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order +#define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led +#define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff +#define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode +#define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check +#define SYM_SETUP_HOST_ID sym_driver_setup.host_id +#define boot_verbose sym_driver_setup.verbose + +/* + * Initial setup. + * + * Can be overriden at startup by a command line. + */ +#define SYM_LINUX_DRIVER_SETUP { \ + .max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \ + .burst_order = 7, \ + .scsi_led = 1, \ + .scsi_diff = 1, \ + .irq_mode = 0, \ + .scsi_bus_check = 1, \ + .host_id = 7, \ + .verbose = 0, \ + .settle_delay = 3, \ + .use_nvram = 1, \ +} + +extern struct sym_driver_setup sym_driver_setup; +extern unsigned int sym_debug_flags; +#define DEBUG_FLAGS sym_debug_flags + +/* + * Max number of targets. + * Maximum is 16 and you are advised not to change this value. + */ +#ifndef SYM_CONF_MAX_TARGET +#define SYM_CONF_MAX_TARGET (16) +#endif + +/* + * Max number of logical units. + * SPI-2 allows up to 64 logical units, but in real life, target + * that implements more that 7 logical units are pretty rare. + * Anyway, the cost of accepting up to 64 logical unit is low in + * this driver, thus going with the maximum is acceptable. + */ +#ifndef SYM_CONF_MAX_LUN +#define SYM_CONF_MAX_LUN (64) +#endif + +/* + * Max number of IO control blocks queued to the controller. + * Each entry needs 8 bytes and the queues are allocated contiguously. + * Since we donnot want to allocate more than a page, the theorical + * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the + * access method. :) + * When not supplied, as it is suggested, the driver compute some + * good value for this parameter. + */ +/* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ + +/* + * Support for Immediate Arbitration. + * Not advised. + */ +/* #define SYM_CONF_IARB_SUPPORT */ + +/* + * Only relevant if IARB support configured. + * - Max number of successive settings of IARB hints. + * - Set IARB on arbitration lost. + */ +#define SYM_CONF_IARB_MAX 3 +#define SYM_CONF_SET_IARB_ON_ARB_LOST 1 + +/* + * Returning wrong residuals may make problems. + * When zero, this define tells the driver to + * always return 0 as transfer residual. + * Btw, all my testings of residuals have succeeded. + */ +#define SYM_SETUP_RESIDUAL_SUPPORT 1 + +#endif /* SYM53C8XX_H */ |