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 sym_get_hcb(struct Scsi_Host * host)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 sym_set_cam_status(struct scsi_cmnd * cmd,int status)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 sym_get_cam_status(struct scsi_cmnd * cmd)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 */ sym_set_cam_result_ok(struct sym_ccb * cp,struct scsi_cmnd * cmd,int resid)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 */ 258