/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * 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> * *-----------------------------------------------------------------------------
*/
#ifndef SYM53C8XX_H #define SYM53C8XX_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
/* * 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;
/* * 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
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