drivers/scsi/sym53c8xx_2/sym_glue.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
   4  * of PCI-SCSI IO processors.
   5  *
   6  * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
   7  *
   8  * This driver is derived from the Linux sym53c8xx driver.
   9  * Copyright (C) 1998-2000  Gerard Roudier
  10  *
  11  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
  12  * a port of the FreeBSD ncr driver to Linux-1.2.13.
  13  *
  14  * The original ncr driver has been written for 386bsd and FreeBSD by
  15  *         Wolfgang Stanglmeier        <wolf@cologne.de>
  16  *         Stefan Esser                <se@mi.Uni-Koeln.de>
  17  * Copyright (C) 1994  Wolfgang Stanglmeier
  18  *
  19  * Other major contributions:
  20  *
  21  * NVRAM detection and reading.
  22  * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
  23  *
  24  *-----------------------------------------------------------------------------
  25  */
  26
  27 #ifndef SYM_GLUE_H
  28 #define SYM_GLUE_H
  29
  30 #include <linux/completion.h>
  31 #include <linux/delay.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/ioport.h>
  34 #include <linux/pci.h>
  35 #include <linux/string.h>
  36 #include <linux/timer.h>
  37 #include <linux/types.h>
  38
  39 #include <asm/io.h>
  40 #ifdef __sparc__
  41 #  include <asm/irq.h>
  42 #endif
  43
  44 #include <scsi/scsi.h>
  45 #include <scsi/scsi_cmnd.h>
  46 #include <scsi/scsi_device.h>
  47 #include <scsi/scsi_transport_spi.h>
  48 #include <scsi/scsi_host.h>
  49
  50 #include "sym53c8xx.h"
  51 #include "sym_defs.h"
  52 #include "sym_misc.h"
  53
  54 /*
  55  * Configuration addendum for Linux.
  56  */
  57 #define SYM_CONF_TIMER_INTERVAL         ((HZ+1)/2)
  58
  59 #undef SYM_OPT_HANDLE_DEVICE_QUEUEING
  60 #define SYM_OPT_LIMIT_COMMAND_REORDERING
  61
  62 /*
  63  *  Print a message with severity.
  64  */
  65 #define printf_emerg(args...)   printk(KERN_EMERG args)
  66 #define printf_alert(args...)   printk(KERN_ALERT args)
  67 #define printf_crit(args...)    printk(KERN_CRIT args)
  68 #define printf_err(args...)     printk(KERN_ERR args)
  69 #define printf_warning(args...) printk(KERN_WARNING args)
  70 #define printf_notice(args...)  printk(KERN_NOTICE args)
  71 #define printf_info(args...)    printk(KERN_INFO args)
  72 #define printf_debug(args...)   printk(KERN_DEBUG args)
  73 #define printf(args...)         printk(args)
  74
  75 /*
  76  *  A 'read barrier' flushes any data that have been prefetched
  77  *  by the processor due to out of order execution. Such a barrier
  78  *  must notably be inserted prior to looking at data that have
  79  *  been DMAed, assuming that program does memory READs in proper
  80  *  order and that the device ensured proper ordering of WRITEs.
  81  *
  82  *  A 'write barrier' prevents any previous WRITEs to pass further
  83  *  WRITEs. Such barriers must be inserted each time another agent
  84  *  relies on ordering of WRITEs.
  85  *
  86  *  Note that, due to posting of PCI memory writes, we also must
  87  *  insert dummy PCI read transactions when some ordering involving
  88  *  both directions over the PCI does matter. PCI transactions are
  89  *  fully ordered in each direction.
  90  */
  91
  92 #define MEMORY_READ_BARRIER()   rmb()
  93 #define MEMORY_WRITE_BARRIER()  wmb()
  94
  95 /*
  96  *  IO functions definition for big/little endian CPU support.
  97  *  For now, PCI chips are only supported in little endian addressing mode,
  98  */
  99
 100 #ifdef  __BIG_ENDIAN
 101
 102 #define readw_l2b       readw
 103 #define readl_l2b       readl
 104 #define writew_b2l      writew
 105 #define writel_b2l      writel
 106
 107 #else   /* little endian */
 108
 109 #define readw_raw       readw
 110 #define readl_raw       readl
 111 #define writew_raw      writew
 112 #define writel_raw      writel
 113
 114 #endif /* endian */
 115
 116 #ifdef  SYM_CONF_CHIP_BIG_ENDIAN
 117 #error  "Chips in BIG ENDIAN addressing mode are not (yet) supported"
 118 #endif
 119
 120 /*
 121  *  If the CPU and the chip use same endian-ness addressing,
 122  *  no byte reordering is needed for script patching.
 123  *  Macro cpu_to_scr() is to be used for script patching.
 124  *  Macro scr_to_cpu() is to be used for getting a DWORD
 125  *  from the script.
 126  */
 127
 128 #define cpu_to_scr(dw)  cpu_to_le32(dw)
 129 #define scr_to_cpu(dw)  le32_to_cpu(dw)
 130
 131 /*
 132  *  These ones are used as return code from
 133  *  error recovery handlers under Linux.
 134  */
 135 #define SCSI_SUCCESS    SUCCESS
 136 #define SCSI_FAILED     FAILED
 137
 138 /*
 139  *  System specific target data structure.
 140  *  None for now, under Linux.
 141  */
 142 /* #define SYM_HAVE_STCB */
 143
 144 /*
 145  *  System specific lun data structure.
 146  */
 147 #define SYM_HAVE_SLCB
 148 struct sym_slcb {
 149         u_short reqtags;        /* Number of tags requested by user */
 150         u_short scdev_depth;    /* Queue depth set in select_queue_depth() */
 151 };
 152
 153 /*
 154  *  System specific command data structure.
 155  *  Not needed under Linux.
 156  */
 157 /* struct sym_sccb */
 158
 159 /*
 160  *  System specific host data structure.
 161  */
 162 struct sym_shcb {
 163         /*
 164          *  Chip and controller identification.
 165          */
 166         int             unit;
 167         char            inst_name[16];
 168         char            chip_name[8];
 169
 170         struct Scsi_Host *host;
 171
 172         void __iomem *  ioaddr;         /* MMIO kernel io address       */
 173         void __iomem *  ramaddr;        /* RAM  kernel io address       */
 174
 175         struct timer_list timer;        /* Timer handler link header    */
 176         u_long          lasttime;
 177         u_long          settle_time;    /* Resetting the SCSI BUS       */
 178         u_char          settle_time_valid;
 179 };
 180
 181 /*
 182  *  Return the name of the controller.
 183  */
 184 #define sym_name(np) (np)->s.inst_name
 185
 186 struct sym_nvram;
 187
 188 /*
 189  * The IO macros require a struct called 's' and are abused in sym_nvram.c
 190  */
 191 struct sym_device {
 192         struct pci_dev *pdev;
 193         unsigned long mmio_base;
 194         unsigned long ram_base;
 195         struct {
 196                 void __iomem *ioaddr;
 197                 void __iomem *ramaddr;
 198         } s;
 199         struct sym_chip chip;
 200         struct sym_nvram *nvram;
 201         u_char host_id;
 202 };
 203
 204 /*
 205  *  Driver host data structure.
 206  */
 207 struct sym_data {
 208         struct sym_hcb *ncb;
 209         struct completion *io_reset;            /* PCI error handling */
 210         struct pci_dev *pdev;
 211 };
 212
 213 static inline struct sym_hcb * sym_get_hcb(struct Scsi_Host *host)
 214 {
 215         return ((struct sym_data *)host->hostdata)->ncb;
 216 }
 217
 218 #include "sym_fw.h"
 219 #include "sym_hipd.h"
 220
 221 /*
 222  *  Set the status field of a CAM CCB.
 223  */
 224 static inline void
 225 sym_set_cam_status(struct scsi_cmnd *cmd, int status)
 226 {
 227         cmd->result &= ~(0xff  << 16);
 228         cmd->result |= (status << 16);
 229 }
 230
 231 /*
 232  *  Get the status field of a CAM CCB.
 233  */
 234 static inline int
 235 sym_get_cam_status(struct scsi_cmnd *cmd)
 236 {
 237         return host_byte(cmd->result);
 238 }
 239
 240 /*
 241  *  Build CAM result for a successful IO and for a failed IO.
 242  */
 243 static inline void sym_set_cam_result_ok(struct sym_ccb *cp, struct scsi_cmnd *cmd, int resid)
 244 {
 245         scsi_set_resid(cmd, resid);
 246         cmd->result = (DID_OK << 16) | (cp->ssss_status & 0x7f);
 247 }
 248 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid);
 249
 250 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *ccb);
 251 #define sym_print_addr(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg)
 252 void sym_xpt_async_bus_reset(struct sym_hcb *np);
 253 int  sym_setup_data_and_start (struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp);
 254 void sym_log_bus_error(struct Scsi_Host *);
 255 void sym_dump_registers(struct Scsi_Host *);
 256
 257 #endif /* SYM_GLUE_H */