drivers/scsi/sym53c8xx_2/sym_glue.h

   1 /*
   2  * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
   3  * of PCI-SCSI IO processors.
   4  *
   5  * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
   6  *
   7  * This driver is derived from the Linux sym53c8xx driver.
   8  * Copyright (C) 1998-2000  Gerard Roudier
   9  *
  10  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
  11  * a port of the FreeBSD ncr driver to Linux-1.2.13.
  12  *
  13  * The original ncr driver has been written for 386bsd and FreeBSD by
  14  *         Wolfgang Stanglmeier        <wolf@cologne.de>
  15  *         Stefan Esser                <se@mi.Uni-Koeln.de>
  16  * Copyright (C) 1994  Wolfgang Stanglmeier
  17  *
  18  * Other major contributions:
  19  *
  20  * NVRAM detection and reading.
  21  * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
  22  *
  23  *-----------------------------------------------------------------------------
  24  *
  25  * This program is free software; you can redistribute it and/or modify
  26  * it under the terms of the GNU General Public License as published by
  27  * the Free Software Foundation; either version 2 of the License, or
  28  * (at your option) any later version.
  29  *
  30  * This program is distributed in the hope that it will be useful,
  31  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  33  * GNU General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software
  37  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  38  */
  39
  40 #ifndef SYM_GLUE_H
  41 #define SYM_GLUE_H
  42
  43 #include <linux/completion.h>
  44 #include <linux/delay.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/ioport.h>
  47 #include <linux/pci.h>
  48 #include <linux/string.h>
  49 #include <linux/timer.h>
  50 #include <linux/types.h>
  51
  52 #include <asm/io.h>
  53 #ifdef __sparc__
  54 #  include <asm/irq.h>
  55 #endif
  56
  57 #include <scsi/scsi.h>
  58 #include <scsi/scsi_cmnd.h>
  59 #include <scsi/scsi_device.h>
  60 #include <scsi/scsi_transport_spi.h>
  61 #include <scsi/scsi_host.h>
  62
  63 #include "sym53c8xx.h"
  64 #include "sym_defs.h"
  65 #include "sym_misc.h"
  66
  67 /*
  68  * Configuration addendum for Linux.
  69  */
  70 #define SYM_CONF_TIMER_INTERVAL         ((HZ+1)/2)
  71
  72 #undef SYM_OPT_HANDLE_DEVICE_QUEUEING
  73 #define SYM_OPT_LIMIT_COMMAND_REORDERING
  74
  75 /*
  76  *  Print a message with severity.
  77  */
  78 #define printf_emerg(args...)   printk(KERN_EMERG args)
  79 #define printf_alert(args...)   printk(KERN_ALERT args)
  80 #define printf_crit(args...)    printk(KERN_CRIT args)
  81 #define printf_err(args...)     printk(KERN_ERR args)
  82 #define printf_warning(args...) printk(KERN_WARNING args)
  83 #define printf_notice(args...)  printk(KERN_NOTICE args)
  84 #define printf_info(args...)    printk(KERN_INFO args)
  85 #define printf_debug(args...)   printk(KERN_DEBUG args)
  86 #define printf(args...)         printk(args)
  87
  88 /*
  89  *  A 'read barrier' flushes any data that have been prefetched
  90  *  by the processor due to out of order execution. Such a barrier
  91  *  must notably be inserted prior to looking at data that have
  92  *  been DMAed, assuming that program does memory READs in proper
  93  *  order and that the device ensured proper ordering of WRITEs.
  94  *
  95  *  A 'write barrier' prevents any previous WRITEs to pass further
  96  *  WRITEs. Such barriers must be inserted each time another agent
  97  *  relies on ordering of WRITEs.
  98  *
  99  *  Note that, due to posting of PCI memory writes, we also must
 100  *  insert dummy PCI read transactions when some ordering involving
 101  *  both directions over the PCI does matter. PCI transactions are
 102  *  fully ordered in each direction.
 103  */
 104
 105 #define MEMORY_READ_BARRIER()   rmb()
 106 #define MEMORY_WRITE_BARRIER()  wmb()
 107
 108 /*
 109  *  IO functions definition for big/little endian CPU support.
 110  *  For now, PCI chips are only supported in little endian addressing mode,
 111  */
 112
 113 #ifdef  __BIG_ENDIAN
 114
 115 #define readw_l2b       readw
 116 #define readl_l2b       readl
 117 #define writew_b2l      writew
 118 #define writel_b2l      writel
 119
 120 #else   /* little endian */
 121
 122 #define readw_raw       readw
 123 #define readl_raw       readl
 124 #define writew_raw      writew
 125 #define writel_raw      writel
 126
 127 #endif /* endian */
 128
 129 #ifdef  SYM_CONF_CHIP_BIG_ENDIAN
 130 #error  "Chips in BIG ENDIAN addressing mode are not (yet) supported"
 131 #endif
 132
 133 /*
 134  *  If the CPU and the chip use same endian-ness addressing,
 135  *  no byte reordering is needed for script patching.
 136  *  Macro cpu_to_scr() is to be used for script patching.
 137  *  Macro scr_to_cpu() is to be used for getting a DWORD
 138  *  from the script.
 139  */
 140
 141 #define cpu_to_scr(dw)  cpu_to_le32(dw)
 142 #define scr_to_cpu(dw)  le32_to_cpu(dw)
 143
 144 /*
 145  *  These ones are used as return code from
 146  *  error recovery handlers under Linux.
 147  */
 148 #define SCSI_SUCCESS    SUCCESS
 149 #define SCSI_FAILED     FAILED
 150
 151 /*
 152  *  System specific target data structure.
 153  *  None for now, under Linux.
 154  */
 155 /* #define SYM_HAVE_STCB */
 156
 157 /*
 158  *  System specific lun data structure.
 159  */
 160 #define SYM_HAVE_SLCB
 161 struct sym_slcb {
 162         u_short reqtags;        /* Number of tags requested by user */
 163         u_short scdev_depth;    /* Queue depth set in select_queue_depth() */
 164 };
 165
 166 /*
 167  *  System specific command data structure.
 168  *  Not needed under Linux.
 169  */
 170 /* struct sym_sccb */
 171
 172 /*
 173  *  System specific host data structure.
 174  */
 175 struct sym_shcb {
 176         /*
 177          *  Chip and controller indentification.
 178          */
 179         int             unit;
 180         char            inst_name[16];
 181         char            chip_name[8];
 182
 183         struct Scsi_Host *host;
 184
 185         void __iomem *  ioaddr;         /* MMIO kernel io address       */
 186         void __iomem *  ramaddr;        /* RAM  kernel io address       */
 187
 188         struct timer_list timer;        /* Timer handler link header    */
 189         u_long          lasttime;
 190         u_long          settle_time;    /* Resetting the SCSI BUS       */
 191         u_char          settle_time_valid;
 192 };
 193
 194 /*
 195  *  Return the name of the controller.
 196  */
 197 #define sym_name(np) (np)->s.inst_name
 198
 199 struct sym_nvram;
 200
 201 /*
 202  * The IO macros require a struct called 's' and are abused in sym_nvram.c
 203  */
 204 struct sym_device {
 205         struct pci_dev *pdev;
 206         unsigned long mmio_base;
 207         unsigned long ram_base;
 208         struct {
 209                 void __iomem *ioaddr;
 210                 void __iomem *ramaddr;
 211         } s;
 212         struct sym_chip chip;
 213         struct sym_nvram *nvram;
 214         u_char host_id;
 215 };
 216
 217 /*
 218  *  Driver host data structure.
 219  */
 220 struct sym_data {
 221         struct sym_hcb *ncb;
 222         struct completion *io_reset;            /* PCI error handling */
 223         struct pci_dev *pdev;
 224 };
 225
 226 static inline struct sym_hcb * sym_get_hcb(struct Scsi_Host *host)
 227 {
 228         return ((struct sym_data *)host->hostdata)->ncb;
 229 }
 230
 231 #include "sym_fw.h"
 232 #include "sym_hipd.h"
 233
 234 /*
 235  *  Set the status field of a CAM CCB.
 236  */
 237 static __inline void
 238 sym_set_cam_status(struct scsi_cmnd *cmd, int status)
 239 {
 240         cmd->result &= ~(0xff  << 16);
 241         cmd->result |= (status << 16);
 242 }
 243
 244 /*
 245  *  Get the status field of a CAM CCB.
 246  */
 247 static __inline int
 248 sym_get_cam_status(struct scsi_cmnd *cmd)
 249 {
 250         return host_byte(cmd->result);
 251 }
 252
 253 /*
 254  *  Build CAM result for a successful IO and for a failed IO.
 255  */
 256 static __inline void sym_set_cam_result_ok(struct sym_ccb *cp, struct scsi_cmnd *cmd, int resid)
 257 {
 258         scsi_set_resid(cmd, resid);
 259         cmd->result = (((DID_OK) << 16) + ((cp->ssss_status) & 0x7f));
 260 }
 261 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid);
 262
 263 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *ccb);
 264 #define sym_print_addr(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg)
 265 void sym_xpt_async_bus_reset(struct sym_hcb *np);
 266 int  sym_setup_data_and_start (struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp);
 267 void sym_log_bus_error(struct Scsi_Host *);
 268 void sym_dump_registers(struct Scsi_Host *);
 269
 270 #endif /* SYM_GLUE_H */