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1/*2 * dc395x.c3 *4 * Device Driver for Tekram DC395(U/UW/F), DC315(U)5 * PCI SCSI Bus Master Host Adapter6 * (SCSI chip set used Tekram ASIC TRM-S1040)7 *8 * Authors:9 * C.L. Huang <ching@tekram.com.tw>10 * Erich Chen <erich@tekram.com.tw>11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd.12 *13 * Kurt Garloff <garloff@suse.de>14 * (C) 1999-2000 Kurt Garloff15 *16 * Oliver Neukum <oliver@neukum.name>17 * Ali Akcaagac <aliakc@web.de>18 * Jamie Lenehan <lenehan@twibble.org>19 * (C) 200320 *21 * License: GNU GPL22 *23 *************************************************************************24 *25 * Redistribution and use in source and binary forms, with or without26 * modification, are permitted provided that the following conditions27 * are met:28 * 1. Redistributions of source code must retain the above copyright29 * notice, this list of conditions and the following disclaimer.30 * 2. Redistributions in binary form must reproduce the above copyright31 * notice, this list of conditions and the following disclaimer in the32 * documentation and/or other materials provided with the distribution.33 * 3. The name of the author may not be used to endorse or promote products34 * derived from this software without specific prior written permission.35 *36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.46 *47 ************************************************************************48 */49#include <linux/module.h>50#include <linux/moduleparam.h>51#include <linux/delay.h>52#include <linux/ctype.h>53#include <linux/blkdev.h>54#include <linux/interrupt.h>55#include <linux/init.h>56#include <linux/spinlock.h>57#include <linux/pci.h>58#include <linux/list.h>59#include <linux/vmalloc.h>60#include <linux/slab.h>61#include <asm/io.h>62 63#include <scsi/scsi.h>64#include <scsi/scsi_cmnd.h>65#include <scsi/scsi_device.h>66#include <scsi/scsi_host.h>67#include <scsi/scsi_transport_spi.h>68 69#include "dc395x.h"70 71#define DC395X_NAME "dc395x"72#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"73#define DC395X_VERSION "v2.05, 2004/03/08"74 75/*---------------------------------------------------------------------------76 Features77 ---------------------------------------------------------------------------*/78/*79 * Set to disable parts of the driver80 */81/*#define DC395x_NO_DISCONNECT*/82/*#define DC395x_NO_TAGQ*/83/*#define DC395x_NO_SYNC*/84/*#define DC395x_NO_WIDE*/85 86/*---------------------------------------------------------------------------87 Debugging88 ---------------------------------------------------------------------------*/89/*90 * Types of debugging that can be enabled and disabled91 */92#define DBG_KG 0x000193#define DBG_0 0x000294#define DBG_1 0x000495#define DBG_SG 0x002096#define DBG_FIFO 0x004097#define DBG_PIO 0x008098 99 100/*101 * Set set of things to output debugging for.102 * Undefine to remove all debugging103 */104/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/105/*#define DEBUG_MASK DBG_0*/106 107 108/*109 * Output a kernel mesage at the specified level and append the110 * driver name and a ": " to the start of the message111 */112#define dprintkl(level, format, arg...) \113 printk(level DC395X_NAME ": " format , ## arg)114 115 116#ifdef DEBUG_MASK117/*118 * print a debug message - this is formated with KERN_DEBUG, then the119 * driver name followed by a ": " and then the message is output. 120 * This also checks that the specified debug level is enabled before121 * outputing the message122 */123#define dprintkdbg(type, format, arg...) \124 do { \125 if ((type) & (DEBUG_MASK)) \126 dprintkl(KERN_DEBUG , format , ## arg); \127 } while (0)128 129/*130 * Check if the specified type of debugging is enabled131 */132#define debug_enabled(type) ((DEBUG_MASK) & (type))133 134#else135/*136 * No debugging. Do nothing137 */138#define dprintkdbg(type, format, arg...) \139 do {} while (0)140#define debug_enabled(type) (0)141 142#endif143 144 145#ifndef PCI_VENDOR_ID_TEKRAM146#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */147#endif148#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040149#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */150#endif151 152 153#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)154#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)155 156#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))157#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))158#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))159#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))160#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))161#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))162 163#define TAG_NONE 255164 165/*166 * srb->segement_x is the hw sg list. It is always allocated as a167 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not168 * cross a page boundy.169 */170#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)171 172 173struct SGentry {174 u32 address; /* bus! address */175 u32 length;176};177 178/* The SEEPROM structure for TRM_S1040 */179struct NVRamTarget {180 u8 cfg0; /* Target configuration byte 0 */181 u8 period; /* Target period */182 u8 cfg2; /* Target configuration byte 2 */183 u8 cfg3; /* Target configuration byte 3 */184};185 186struct NvRamType {187 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */188 u8 sub_sys_id[2]; /* 2,3 Sub System ID */189 u8 sub_class; /* 4 Sub Class */190 u8 vendor_id[2]; /* 5,6 Vendor ID */191 u8 device_id[2]; /* 7,8 Device ID */192 u8 reserved; /* 9 Reserved */193 struct NVRamTarget target[DC395x_MAX_SCSI_ID];194 /** 10,11,12,13195 ** 14,15,16,17196 ** ....197 ** ....198 ** 70,71,72,73199 */200 u8 scsi_id; /* 74 Host Adapter SCSI ID */201 u8 channel_cfg; /* 75 Channel configuration */202 u8 delay_time; /* 76 Power on delay time */203 u8 max_tag; /* 77 Maximum tags */204 u8 reserved0; /* 78 */205 u8 boot_target; /* 79 */206 u8 boot_lun; /* 80 */207 u8 reserved1; /* 81 */208 u16 reserved2[22]; /* 82,..125 */209 u16 cksum; /* 126,127 */210};211 212struct ScsiReqBlk {213 struct list_head list; /* next/prev ptrs for srb lists */214 struct DeviceCtlBlk *dcb;215 struct scsi_cmnd *cmd;216 217 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */218 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */219 220 u8 sg_count; /* No of HW sg entries for this request */221 u8 sg_index; /* Index of HW sg entry for this request */222 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */223 size_t request_length; /* Total number of bytes in this request */224 /*225 * The sense buffer handling function, request_sense, uses226 * the first hw sg entry (segment_x[0]) and the transfer227 * length (total_xfer_length). While doing this it stores the228 * original values into the last sg hw list229 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the230 * total_xfer_length in xferred. These values are restored in231 * pci_unmap_srb_sense. This is the only place xferred is used.232 */233 size_t xferred; /* Saved copy of total_xfer_length */234 235 u16 state;236 237 u8 msgin_buf[6];238 u8 msgout_buf[6];239 240 u8 adapter_status;241 u8 target_status;242 u8 msg_count;243 u8 end_message;244 245 u8 tag_number;246 u8 status;247 u8 retry_count;248 u8 flag;249 250 u8 scsi_phase;251};252 253struct DeviceCtlBlk {254 struct list_head list; /* next/prev ptrs for the dcb list */255 struct AdapterCtlBlk *acb;256 struct list_head srb_going_list; /* head of going srb list */257 struct list_head srb_waiting_list; /* head of waiting srb list */258 259 struct ScsiReqBlk *active_srb;260 u32 tag_mask;261 262 u16 max_command;263 264 u8 target_id; /* SCSI Target ID (SCSI Only) */265 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */266 u8 identify_msg;267 u8 dev_mode;268 269 u8 inquiry7; /* To store Inquiry flags */270 u8 sync_mode; /* 0:async mode */271 u8 min_nego_period; /* for nego. */272 u8 sync_period; /* for reg. */273 274 u8 sync_offset; /* for reg. and nego.(low nibble) */275 u8 flag;276 u8 dev_type;277 u8 init_tcq_flag;278};279 280struct AdapterCtlBlk {281 struct Scsi_Host *scsi_host;282 283 unsigned long io_port_base;284 unsigned long io_port_len;285 286 struct list_head dcb_list; /* head of going dcb list */287 struct DeviceCtlBlk *dcb_run_robin;288 struct DeviceCtlBlk *active_dcb;289 290 struct list_head srb_free_list; /* head of free srb list */291 struct ScsiReqBlk *tmp_srb;292 struct timer_list waiting_timer;293 struct timer_list selto_timer;294 295 unsigned long last_reset;296 297 u16 srb_count;298 299 u8 sel_timeout;300 301 unsigned int irq_level;302 u8 tag_max_num;303 u8 acb_flag;304 u8 gmode2;305 306 u8 config;307 u8 lun_chk;308 u8 scan_devices;309 u8 hostid_bit;310 311 u8 dcb_map[DC395x_MAX_SCSI_ID];312 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];313 314 struct pci_dev *dev;315 316 u8 msg_len;317 318 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];319 struct ScsiReqBlk srb;320 321 struct NvRamType eeprom; /* eeprom settings for this adapter */322};323 324 325/*---------------------------------------------------------------------------326 Forward declarations327 ---------------------------------------------------------------------------*/328static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,329 u16 *pscsi_status);330static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,331 u16 *pscsi_status);332static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,333 u16 *pscsi_status);334static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,335 u16 *pscsi_status);336static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,337 u16 *pscsi_status);338static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,339 u16 *pscsi_status);340static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,341 u16 *pscsi_status);342static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,343 u16 *pscsi_status);344static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,345 u16 *pscsi_status);346static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,347 u16 *pscsi_status);348static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,349 u16 *pscsi_status);350static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,351 u16 *pscsi_status);352static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,353 u16 *pscsi_status);354static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 355 u16 *pscsi_status);356static void set_basic_config(struct AdapterCtlBlk *acb);357static void cleanup_after_transfer(struct AdapterCtlBlk *acb,358 struct ScsiReqBlk *srb);359static void reset_scsi_bus(struct AdapterCtlBlk *acb);360static void data_io_transfer(struct AdapterCtlBlk *acb,361 struct ScsiReqBlk *srb, u16 io_dir);362static void disconnect(struct AdapterCtlBlk *acb);363static void reselect(struct AdapterCtlBlk *acb);364static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,365 struct ScsiReqBlk *srb);366static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,367 struct ScsiReqBlk *srb);368static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,369 struct ScsiReqBlk *srb);370static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,371 struct scsi_cmnd *cmd, u8 force);372static void scsi_reset_detect(struct AdapterCtlBlk *acb);373static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);374static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,375 struct ScsiReqBlk *srb);376static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,377 struct ScsiReqBlk *srb);378static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,379 struct ScsiReqBlk *srb);380static void set_xfer_rate(struct AdapterCtlBlk *acb,381 struct DeviceCtlBlk *dcb);382static void waiting_timeout(struct timer_list *t);383 384 385/*---------------------------------------------------------------------------386 Static Data387 ---------------------------------------------------------------------------*/388static u16 current_sync_offset = 0;389 390static void *dc395x_scsi_phase0[] = {391 data_out_phase0,/* phase:0 */392 data_in_phase0, /* phase:1 */393 command_phase0, /* phase:2 */394 status_phase0, /* phase:3 */395 nop0, /* phase:4 PH_BUS_FREE .. initial phase */396 nop0, /* phase:5 PH_BUS_FREE .. initial phase */397 msgout_phase0, /* phase:6 */398 msgin_phase0, /* phase:7 */399};400 401static void *dc395x_scsi_phase1[] = {402 data_out_phase1,/* phase:0 */403 data_in_phase1, /* phase:1 */404 command_phase1, /* phase:2 */405 status_phase1, /* phase:3 */406 nop1, /* phase:4 PH_BUS_FREE .. initial phase */407 nop1, /* phase:5 PH_BUS_FREE .. initial phase */408 msgout_phase1, /* phase:6 */409 msgin_phase1, /* phase:7 */410};411 412/*413 *Fast20: 000 50ns, 20.0 MHz414 * 001 75ns, 13.3 MHz415 * 010 100ns, 10.0 MHz416 * 011 125ns, 8.0 MHz417 * 100 150ns, 6.6 MHz418 * 101 175ns, 5.7 MHz419 * 110 200ns, 5.0 MHz420 * 111 250ns, 4.0 MHz421 *422 *Fast40(LVDS): 000 25ns, 40.0 MHz423 * 001 50ns, 20.0 MHz424 * 010 75ns, 13.3 MHz425 * 011 100ns, 10.0 MHz426 * 100 125ns, 8.0 MHz427 * 101 150ns, 6.6 MHz428 * 110 175ns, 5.7 MHz429 * 111 200ns, 5.0 MHz430 */431/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/432 433/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */434static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };435static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };436 437 438/*---------------------------------------------------------------------------439 Configuration440 ---------------------------------------------------------------------------*/441/*442 * Module/boot parameters currently effect *all* instances of the443 * card in the system.444 */445 446/*447 * Command line parameters are stored in a structure below.448 * These are the index's into the structure for the various449 * command line options.450 */451#define CFG_ADAPTER_ID 0452#define CFG_MAX_SPEED 1453#define CFG_DEV_MODE 2454#define CFG_ADAPTER_MODE 3455#define CFG_TAGS 4456#define CFG_RESET_DELAY 5457 458#define CFG_NUM 6 /* number of configuration items */459 460 461/*462 * Value used to indicate that a command line override463 * hasn't been used to modify the value.464 */465#define CFG_PARAM_UNSET -1466 467 468/*469 * Hold command line parameters.470 */471struct ParameterData {472 int value; /* value of this setting */473 int min; /* minimum value */474 int max; /* maximum value */475 int def; /* default value */476 int safe; /* safe value */477};478static struct ParameterData cfg_data[] = {479 { /* adapter id */480 CFG_PARAM_UNSET,481 0,482 15,483 7,484 7485 },486 { /* max speed */487 CFG_PARAM_UNSET,488 0,489 7,490 1, /* 13.3Mhz */491 4, /* 6.7Hmz */492 },493 { /* dev mode */494 CFG_PARAM_UNSET,495 0,496 0x3f,497 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |498 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |499 NTC_DO_SEND_START,500 NTC_DO_PARITY_CHK | NTC_DO_SEND_START501 },502 { /* adapter mode */503 CFG_PARAM_UNSET,504 0,505 0x2f,506 NAC_SCANLUN |507 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET508 /*| NAC_ACTIVE_NEG*/,509 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08510 },511 { /* tags */512 CFG_PARAM_UNSET,513 0,514 5,515 3, /* 16 tags (??) */516 2,517 },518 { /* reset delay */519 CFG_PARAM_UNSET,520 0,521 180,522 1, /* 1 second */523 10, /* 10 seconds */524 }525};526 527 528/*529 * Safe settings. If set to zero the BIOS/default values with530 * command line overrides will be used. If set to 1 then safe and531 * slow settings will be used.532 */533static bool use_safe_settings = 0;534module_param_named(safe, use_safe_settings, bool, 0);535MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");536 537 538module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);539MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");540 541module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);542MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");543 544module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);545MODULE_PARM_DESC(dev_mode, "Device mode.");546 547module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);548MODULE_PARM_DESC(adapter_mode, "Adapter mode.");549 550module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);551MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");552 553module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);554MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");555 556 557/**558 * set_safe_settings - if the use_safe_settings option is set then559 * set all values to the safe and slow values.560 **/561static void set_safe_settings(void)562{563 if (use_safe_settings)564 {565 int i;566 567 dprintkl(KERN_INFO, "Using safe settings.\n");568 for (i = 0; i < CFG_NUM; i++)569 {570 cfg_data[i].value = cfg_data[i].safe;571 }572 }573}574 575 576/**577 * fix_settings - reset any boot parameters which are out of range578 * back to the default values.579 **/580static void fix_settings(void)581{582 int i;583 584 dprintkdbg(DBG_1,585 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "586 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",587 cfg_data[CFG_ADAPTER_ID].value,588 cfg_data[CFG_MAX_SPEED].value,589 cfg_data[CFG_DEV_MODE].value,590 cfg_data[CFG_ADAPTER_MODE].value,591 cfg_data[CFG_TAGS].value,592 cfg_data[CFG_RESET_DELAY].value);593 for (i = 0; i < CFG_NUM; i++)594 {595 if (cfg_data[i].value < cfg_data[i].min596 || cfg_data[i].value > cfg_data[i].max)597 cfg_data[i].value = cfg_data[i].def;598 }599}600 601 602 603/*604 * Mapping from the eeprom delay index value (index into this array)605 * to the number of actual seconds that the delay should be for.606 */607static char eeprom_index_to_delay_map[] =608 { 1, 3, 5, 10, 16, 30, 60, 120 };609 610 611/**612 * eeprom_index_to_delay - Take the eeprom delay setting and convert it613 * into a number of seconds.614 *615 * @eeprom: The eeprom structure in which we find the delay index to map.616 **/617static void eeprom_index_to_delay(struct NvRamType *eeprom)618{619 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];620}621 622 623/**624 * delay_to_eeprom_index - Take a delay in seconds and return the625 * closest eeprom index which will delay for at least that amount of626 * seconds.627 *628 * @delay: The delay, in seconds, to find the eeprom index for.629 **/630static int delay_to_eeprom_index(int delay)631{632 u8 idx = 0;633 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)634 idx++;635 return idx;636}637 638 639/**640 * eeprom_override - Override the eeprom settings, in the provided641 * eeprom structure, with values that have been set on the command642 * line.643 *644 * @eeprom: The eeprom data to override with command line options.645 **/646static void eeprom_override(struct NvRamType *eeprom)647{648 u8 id;649 650 /* Adapter Settings */651 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)652 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;653 654 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)655 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;656 657 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)658 eeprom->delay_time = delay_to_eeprom_index(659 cfg_data[CFG_RESET_DELAY].value);660 661 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)662 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;663 664 /* Device Settings */665 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {666 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)667 eeprom->target[id].cfg0 =668 (u8)cfg_data[CFG_DEV_MODE].value;669 670 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)671 eeprom->target[id].period =672 (u8)cfg_data[CFG_MAX_SPEED].value;673 674 }675}676 677 678/*---------------------------------------------------------------------------679 ---------------------------------------------------------------------------*/680 681static unsigned int list_size(struct list_head *head)682{683 unsigned int count = 0;684 struct list_head *pos;685 list_for_each(pos, head)686 count++;687 return count;688}689 690 691static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,692 struct DeviceCtlBlk *pos)693{694 int use_next = 0;695 struct DeviceCtlBlk* next = NULL;696 struct DeviceCtlBlk* i;697 698 if (list_empty(head))699 return NULL;700 701 /* find supplied dcb and then select the next one */702 list_for_each_entry(i, head, list)703 if (use_next) {704 next = i;705 break;706 } else if (i == pos) {707 use_next = 1;708 }709 /* if no next one take the head one (ie, wraparound) */710 if (!next)711 list_for_each_entry(i, head, list) {712 next = i;713 break;714 }715 716 return next;717}718 719 720static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)721{722 if (srb->tag_number < 255) {723 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */724 srb->tag_number = 255;725 }726}727 728 729/* Find cmd in SRB list */730static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,731 struct list_head *head)732{733 struct ScsiReqBlk *i;734 list_for_each_entry(i, head, list)735 if (i->cmd == cmd)736 return i;737 return NULL;738}739 740/* Sets the timer to wake us up */741static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)742{743 if (timer_pending(&acb->waiting_timer))744 return;745 if (time_before(jiffies + to, acb->last_reset - HZ / 2))746 acb->waiting_timer.expires =747 acb->last_reset - HZ / 2 + 1;748 else749 acb->waiting_timer.expires = jiffies + to + 1;750 add_timer(&acb->waiting_timer);751}752 753 754/* Send the next command from the waiting list to the bus */755static void waiting_process_next(struct AdapterCtlBlk *acb)756{757 struct DeviceCtlBlk *start = NULL;758 struct DeviceCtlBlk *pos;759 struct DeviceCtlBlk *dcb;760 struct ScsiReqBlk *srb;761 struct list_head *dcb_list_head = &acb->dcb_list;762 763 if (acb->active_dcb764 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))765 return;766 767 if (timer_pending(&acb->waiting_timer))768 del_timer(&acb->waiting_timer);769 770 if (list_empty(dcb_list_head))771 return;772 773 /*774 * Find the starting dcb. Need to find it again in the list775 * since the list may have changed since we set the ptr to it776 */777 list_for_each_entry(dcb, dcb_list_head, list)778 if (dcb == acb->dcb_run_robin) {779 start = dcb;780 break;781 }782 if (!start) {783 /* This can happen! */784 start = list_entry(dcb_list_head->next, typeof(*start), list);785 acb->dcb_run_robin = start;786 }787 788 789 /*790 * Loop over the dcb, but we start somewhere (potentially) in791 * the middle of the loop so we need to manully do this.792 */793 pos = start;794 do {795 struct list_head *waiting_list_head = &pos->srb_waiting_list;796 797 /* Make sure, the next another device gets scheduled ... */798 acb->dcb_run_robin = dcb_get_next(dcb_list_head,799 acb->dcb_run_robin);800 801 if (list_empty(waiting_list_head) ||802 pos->max_command <= list_size(&pos->srb_going_list)) {803 /* move to next dcb */804 pos = dcb_get_next(dcb_list_head, pos);805 } else {806 srb = list_entry(waiting_list_head->next,807 struct ScsiReqBlk, list);808 809 /* Try to send to the bus */810 if (!start_scsi(acb, pos, srb))811 list_move(&srb->list, &pos->srb_going_list);812 else813 waiting_set_timer(acb, HZ/50);814 break;815 }816 } while (pos != start);817}818 819 820/* Wake up waiting queue */821static void waiting_timeout(struct timer_list *t)822{823 unsigned long flags;824 struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);825 dprintkdbg(DBG_1,826 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);827 DC395x_LOCK_IO(acb->scsi_host, flags);828 waiting_process_next(acb);829 DC395x_UNLOCK_IO(acb->scsi_host, flags);830}831 832 833/* Get the DCB for a given ID/LUN combination */834static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)835{836 return acb->children[id][lun];837}838 839 840/* Send SCSI Request Block (srb) to adapter (acb) */841static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)842{843 struct DeviceCtlBlk *dcb = srb->dcb;844 845 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||846 acb->active_dcb ||847 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {848 list_add_tail(&srb->list, &dcb->srb_waiting_list);849 waiting_process_next(acb);850 return;851 }852 853 if (!start_scsi(acb, dcb, srb)) {854 list_add_tail(&srb->list, &dcb->srb_going_list);855 } else {856 list_add(&srb->list, &dcb->srb_waiting_list);857 waiting_set_timer(acb, HZ / 50);858 }859}860 861/* Prepare SRB for being sent to Device DCB w/ command *cmd */862static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,863 struct ScsiReqBlk *srb)864{865 int nseg;866 enum dma_data_direction dir = cmd->sc_data_direction;867 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",868 cmd, dcb->target_id, dcb->target_lun);869 870 srb->dcb = dcb;871 srb->cmd = cmd;872 srb->sg_count = 0;873 srb->total_xfer_length = 0;874 srb->sg_bus_addr = 0;875 srb->sg_index = 0;876 srb->adapter_status = 0;877 srb->target_status = 0;878 srb->msg_count = 0;879 srb->status = 0;880 srb->flag = 0;881 srb->state = 0;882 srb->retry_count = 0;883 srb->tag_number = TAG_NONE;884 srb->scsi_phase = PH_BUS_FREE; /* initial phase */885 srb->end_message = 0;886 887 nseg = scsi_dma_map(cmd);888 BUG_ON(nseg < 0);889 890 if (dir == DMA_NONE || !nseg) {891 dprintkdbg(DBG_0,892 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",893 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),894 srb->segment_x[0].address);895 } else {896 int i;897 u32 reqlen = scsi_bufflen(cmd);898 struct scatterlist *sg;899 struct SGentry *sgp = srb->segment_x;900 901 srb->sg_count = nseg;902 903 dprintkdbg(DBG_0,904 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",905 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),906 srb->sg_count);907 908 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {909 u32 busaddr = (u32)sg_dma_address(sg);910 u32 seglen = (u32)sg->length;911 sgp[i].address = busaddr;912 sgp[i].length = seglen;913 srb->total_xfer_length += seglen;914 }915 sgp += srb->sg_count - 1;916 917 /*918 * adjust last page if too big as it is allocated919 * on even page boundaries920 */921 if (srb->total_xfer_length > reqlen) {922 sgp->length -= (srb->total_xfer_length - reqlen);923 srb->total_xfer_length = reqlen;924 }925 926 /* Fixup for WIDE padding - make sure length is even */927 if (dcb->sync_period & WIDE_SYNC &&928 srb->total_xfer_length % 2) {929 srb->total_xfer_length++;930 sgp->length++;931 }932 933 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,934 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);935 936 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",937 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);938 }939 940 srb->request_length = srb->total_xfer_length;941}942 943 944/**945 * dc395x_queue_command_lck - queue scsi command passed from the mid946 * layer, invoke 'done' on completion947 *948 * @cmd: pointer to scsi command object949 *950 * Returns 1 if the adapter (host) is busy, else returns 0. One951 * reason for an adapter to be busy is that the number952 * of outstanding queued commands is already equal to953 * struct Scsi_Host::can_queue .954 *955 * Required: if struct Scsi_Host::can_queue is ever non-zero956 * then this function is required.957 *958 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")959 * and is expected to be held on return.960 *961 */962static int dc395x_queue_command_lck(struct scsi_cmnd *cmd)963{964 void (*done)(struct scsi_cmnd *) = scsi_done;965 struct DeviceCtlBlk *dcb;966 struct ScsiReqBlk *srb;967 struct AdapterCtlBlk *acb =968 (struct AdapterCtlBlk *)cmd->device->host->hostdata;969 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",970 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);971 972 /* Assume BAD_TARGET; will be cleared later */973 set_host_byte(cmd, DID_BAD_TARGET);974 975 /* ignore invalid targets */976 if (cmd->device->id >= acb->scsi_host->max_id ||977 cmd->device->lun >= acb->scsi_host->max_lun ||978 cmd->device->lun >31) {979 goto complete;980 }981 982 /* does the specified lun on the specified device exist */983 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {984 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",985 cmd->device->id, (u8)cmd->device->lun);986 goto complete;987 }988 989 /* do we have a DCB for the device */990 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);991 if (!dcb) {992 /* should never happen */993 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",994 cmd->device->id, (u8)cmd->device->lun);995 goto complete;996 }997 998 set_host_byte(cmd, DID_OK);999 set_status_byte(cmd, SAM_STAT_GOOD);1000 1001 srb = list_first_entry_or_null(&acb->srb_free_list,1002 struct ScsiReqBlk, list);1003 if (!srb) {1004 /*1005 * Return 1 since we are unable to queue this command at this1006 * point in time.1007 */1008 dprintkdbg(DBG_0, "queue_command: No free srb's\n");1009 return 1;1010 }1011 list_del(&srb->list);1012 1013 build_srb(cmd, dcb, srb);1014 1015 if (!list_empty(&dcb->srb_waiting_list)) {1016 /* append to waiting queue */1017 list_add_tail(&srb->list, &dcb->srb_waiting_list);1018 waiting_process_next(acb);1019 } else {1020 /* process immediately */1021 send_srb(acb, srb);1022 }1023 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);1024 return 0;1025 1026complete:1027 /*1028 * Complete the command immediatey, and then return 0 to1029 * indicate that we have handled the command. This is usually1030 * done when the commad is for things like non existent1031 * devices.1032 */1033 done(cmd);1034 return 0;1035}1036 1037static DEF_SCSI_QCMD(dc395x_queue_command)1038 1039static void dump_register_info(struct AdapterCtlBlk *acb,1040 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)1041{1042 u16 pstat;1043 struct pci_dev *dev = acb->dev;1044 pci_read_config_word(dev, PCI_STATUS, &pstat);1045 if (!dcb)1046 dcb = acb->active_dcb;1047 if (!srb && dcb)1048 srb = dcb->active_srb;1049 if (srb) {1050 if (!srb->cmd)1051 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",1052 srb, srb->cmd);1053 else1054 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "1055 "cmnd=0x%02x <%02i-%i>\n",1056 srb, srb->cmd,1057 srb->cmd->cmnd[0], srb->cmd->device->id,1058 (u8)srb->cmd->device->lun);1059 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",1060 srb->segment_x, srb->sg_count, srb->sg_index,1061 srb->total_xfer_length);1062 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",1063 srb->state, srb->status, srb->scsi_phase,1064 (acb->active_dcb) ? "" : "not");1065 }1066 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "1067 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "1068 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "1069 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",1070 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),1071 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),1072 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),1073 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),1074 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),1075 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),1076 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),1077 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),1078 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),1079 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),1080 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),1081 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),1082 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));1083 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "1084 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "1085 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",1086 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),1087 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),1088 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),1089 DC395x_read8(acb, TRM_S1040_DMA_STATUS),1090 DC395x_read8(acb, TRM_S1040_DMA_INTEN),1091 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),1092 DC395x_read32(acb, TRM_S1040_DMA_XCNT),1093 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),1094 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),1095 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));1096 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "1097 "pci{status=0x%04x}\n",1098 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),1099 DC395x_read8(acb, TRM_S1040_GEN_STATUS),1100 DC395x_read8(acb, TRM_S1040_GEN_TIMER),1101 pstat);1102}1103 1104 1105static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)1106{1107#if debug_enabled(DBG_FIFO)1108 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);1109 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);1110 if (!(fifocnt & 0x40))1111 dprintkdbg(DBG_FIFO,1112 "clear_fifo: (%i bytes) on phase %02x in %s\n",1113 fifocnt & 0x3f, lines, txt);1114#endif1115 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);1116}1117 1118 1119static void reset_dev_param(struct AdapterCtlBlk *acb)1120{1121 struct DeviceCtlBlk *dcb;1122 struct NvRamType *eeprom = &acb->eeprom;1123 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);1124 1125 list_for_each_entry(dcb, &acb->dcb_list, list) {1126 u8 period_index;1127 1128 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);1129 dcb->sync_period = 0;1130 dcb->sync_offset = 0;1131 1132 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;1133 period_index = eeprom->target[dcb->target_id].period & 0x07;1134 dcb->min_nego_period = clock_period[period_index];1135 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)1136 || !(acb->config & HCC_WIDE_CARD))1137 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;1138 }1139}1140 1141 1142/*1143 * perform a hard reset on the SCSI bus1144 * @cmd - some command for this host (for fetching hooks)1145 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).1146 */1147static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)1148{1149 struct AdapterCtlBlk *acb =1150 (struct AdapterCtlBlk *)cmd->device->host->hostdata;1151 dprintkl(KERN_INFO,1152 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",1153 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);1154 1155 if (timer_pending(&acb->waiting_timer))1156 del_timer(&acb->waiting_timer);1157 1158 /*1159 * disable interrupt 1160 */1161 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);1162 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);1163 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);1164 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);1165 1166 reset_scsi_bus(acb);1167 udelay(500);1168 1169 /* We may be in serious trouble. Wait some seconds */1170 acb->last_reset =1171 jiffies + 3 * HZ / 2 +1172 HZ * acb->eeprom.delay_time;1173 1174 /*1175 * re-enable interrupt 1176 */1177 /* Clear SCSI FIFO */1178 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);1179 clear_fifo(acb, "eh_bus_reset");1180 /* Delete pending IRQ */1181 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);1182 set_basic_config(acb);1183 1184 reset_dev_param(acb);1185 doing_srb_done(acb, DID_RESET, cmd, 0);1186 acb->active_dcb = NULL;1187 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */1188 waiting_process_next(acb);1189 1190 return SUCCESS;1191}1192 1193static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)1194{1195 int rc;1196 1197 spin_lock_irq(cmd->device->host->host_lock);1198 rc = __dc395x_eh_bus_reset(cmd);1199 spin_unlock_irq(cmd->device->host->host_lock);1200 1201 return rc;1202}1203 1204/*1205 * abort an errant SCSI command1206 * @cmd - command to be aborted1207 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).1208 */1209static int dc395x_eh_abort(struct scsi_cmnd *cmd)1210{1211 /*1212 * Look into our command queues: If it has not been sent already,1213 * we remove it and return success. Otherwise fail.1214 */1215 struct AdapterCtlBlk *acb =1216 (struct AdapterCtlBlk *)cmd->device->host->hostdata;1217 struct DeviceCtlBlk *dcb;1218 struct ScsiReqBlk *srb;1219 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",1220 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);1221 1222 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);1223 if (!dcb) {1224 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");1225 return FAILED;1226 }1227 1228 srb = find_cmd(cmd, &dcb->srb_waiting_list);1229 if (srb) {1230 list_del(&srb->list);1231 pci_unmap_srb_sense(acb, srb);1232 pci_unmap_srb(acb, srb);1233 free_tag(dcb, srb);1234 list_add_tail(&srb->list, &acb->srb_free_list);1235 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");1236 set_host_byte(cmd, DID_ABORT);1237 return SUCCESS;1238 }1239 srb = find_cmd(cmd, &dcb->srb_going_list);1240 if (srb) {1241 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");1242 /* XXX: Should abort the command here */1243 } else {1244 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");1245 }1246 return FAILED;1247}1248 1249 1250/* SDTR */1251static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,1252 struct ScsiReqBlk *srb)1253{1254 u8 *ptr = srb->msgout_buf + srb->msg_count;1255 if (srb->msg_count > 1) {1256 dprintkl(KERN_INFO,1257 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",1258 srb->msg_count, srb->msgout_buf[0],1259 srb->msgout_buf[1]);1260 return;1261 }1262 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {1263 dcb->sync_offset = 0;1264 dcb->min_nego_period = 200 >> 2;1265 } else if (dcb->sync_offset == 0)1266 dcb->sync_offset = SYNC_NEGO_OFFSET;1267 1268 srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period,1269 dcb->sync_offset);1270 srb->state |= SRB_DO_SYNC_NEGO;1271}1272 1273 1274/* WDTR */1275static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,1276 struct ScsiReqBlk *srb)1277{1278 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &1279 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;1280 u8 *ptr = srb->msgout_buf + srb->msg_count;1281 if (srb->msg_count > 1) {1282 dprintkl(KERN_INFO,1283 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",1284 srb->msg_count, srb->msgout_buf[0],1285 srb->msgout_buf[1]);1286 return;1287 }1288 srb->msg_count += spi_populate_width_msg(ptr, wide);1289 srb->state |= SRB_DO_WIDE_NEGO;1290}1291 1292 1293#if 01294/* Timer to work around chip flaw: When selecting and the bus is 1295 * busy, we sometimes miss a Selection timeout IRQ */1296void selection_timeout_missed(unsigned long ptr);1297/* Sets the timer to wake us up */1298static void selto_timer(struct AdapterCtlBlk *acb)1299{1300 if (timer_pending(&acb->selto_timer))1301 return;1302 acb->selto_timer.function = selection_timeout_missed;1303 acb->selto_timer.data = (unsigned long) acb;1304 if (time_before1305 (jiffies + HZ, acb->last_reset + HZ / 2))1306 acb->selto_timer.expires =1307 acb->last_reset + HZ / 2 + 1;1308 else1309 acb->selto_timer.expires = jiffies + HZ + 1;1310 add_timer(&acb->selto_timer);1311}1312 1313 1314void selection_timeout_missed(unsigned long ptr)1315{1316 unsigned long flags;1317 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;1318 struct ScsiReqBlk *srb;1319 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");1320 if (!acb->active_dcb || !acb->active_dcb->active_srb) {1321 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");1322 return;1323 }1324 DC395x_LOCK_IO(acb->scsi_host, flags);1325 srb = acb->active_dcb->active_srb;1326 disconnect(acb);1327 DC395x_UNLOCK_IO(acb->scsi_host, flags);1328}1329#endif1330 1331 1332static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,1333 struct ScsiReqBlk* srb)1334{1335 u16 __maybe_unused s_stat2, return_code;1336 u8 s_stat, scsicommand, i, identify_message;1337 u8 *ptr;1338 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",1339 dcb->target_id, dcb->target_lun, srb);1340 1341 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */1342 1343 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);1344 s_stat2 = 0;1345 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);1346#if 11347 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {1348 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",1349 s_stat, s_stat2);1350 /*1351 * Try anyway?1352 *1353 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection1354 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!1355 * (This is likely to be a bug in the hardware. Obviously, most people1356 * only have one initiator per SCSI bus.)1357 * Instead let this fail and have the timer make sure the command is 1358 * tried again after a short time1359 */1360 /*selto_timer (acb); */1361 return 1;1362 }1363#endif1364 if (acb->active_dcb) {1365 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"1366 "command while another command (0x%p) is active.",1367 srb->cmd,1368 acb->active_dcb->active_srb ?1369 acb->active_dcb->active_srb->cmd : NULL);1370 return 1;1371 }1372 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {1373 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);1374 return 1;1375 }1376 /* Allow starting of SCSI commands half a second before we allow the mid-level1377 * to queue them again after a reset */1378 if (time_before(jiffies, acb->last_reset - HZ / 2)) {1379 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");1380 return 1;1381 }1382 1383 /* Flush FIFO */1384 clear_fifo(acb, "start_scsi");1385 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);1386 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);1387 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);1388 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);1389 srb->scsi_phase = PH_BUS_FREE; /* initial phase */1390 1391 identify_message = dcb->identify_msg;1392 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */1393 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */1394 if (srb->flag & AUTO_REQSENSE)1395 identify_message &= 0xBF;1396 1397 if (((srb->cmd->cmnd[0] == INQUIRY)1398 || (srb->cmd->cmnd[0] == REQUEST_SENSE)1399 || (srb->flag & AUTO_REQSENSE))1400 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)1401 && !(dcb->sync_mode & WIDE_NEGO_DONE))1402 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)1403 && !(dcb->sync_mode & SYNC_NEGO_DONE)))1404 && (dcb->target_lun == 0)) {1405 srb->msgout_buf[0] = identify_message;1406 srb->msg_count = 1;1407 scsicommand = SCMD_SEL_ATNSTOP;1408 srb->state = SRB_MSGOUT;1409#ifndef SYNC_FIRST1410 if (dcb->sync_mode & WIDE_NEGO_ENABLE1411 && dcb->inquiry7 & SCSI_INQ_WBUS16) {1412 build_wdtr(acb, dcb, srb);1413 goto no_cmd;1414 }1415#endif1416 if (dcb->sync_mode & SYNC_NEGO_ENABLE1417 && dcb->inquiry7 & SCSI_INQ_SYNC) {1418 build_sdtr(acb, dcb, srb);1419 goto no_cmd;1420 }1421 if (dcb->sync_mode & WIDE_NEGO_ENABLE1422 && dcb->inquiry7 & SCSI_INQ_WBUS16) {1423 build_wdtr(acb, dcb, srb);1424 goto no_cmd;1425 }1426 srb->msg_count = 0;1427 }1428 /* Send identify message */1429 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);1430 1431 scsicommand = SCMD_SEL_ATN;1432 srb->state = SRB_START_;1433#ifndef DC395x_NO_TAGQ1434 if ((dcb->sync_mode & EN_TAG_QUEUEING)1435 && (identify_message & 0xC0)) {1436 /* Send Tag message */1437 u32 tag_mask = 1;1438 u8 tag_number = 0;1439 while (tag_mask & dcb->tag_mask1440 && tag_number < dcb->max_command) {1441 tag_mask = tag_mask << 1;1442 tag_number++;1443 }1444 if (tag_number >= dcb->max_command) {1445 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "1446 "Out of tags target=<%02i-%i>)\n",1447 srb->cmd, srb->cmd->device->id,1448 (u8)srb->cmd->device->lun);1449 srb->state = SRB_READY;1450 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,1451 DO_HWRESELECT);1452 return 1;1453 }1454 /* Send Tag id */1455 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SIMPLE_QUEUE_TAG);1456 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);1457 dcb->tag_mask |= tag_mask;1458 srb->tag_number = tag_number;1459 scsicommand = SCMD_SEL_ATN3;1460 srb->state = SRB_START_;1461 }1462#endif1463/*polling:*/1464 /* Send CDB ..command block ......... */1465 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",1466 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,1467 srb->cmd->cmnd[0], srb->tag_number);1468 if (srb->flag & AUTO_REQSENSE) {1469 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);1470 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));1471 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);1472 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);1473 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);1474 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);1475 } else {1476 ptr = (u8 *)srb->cmd->cmnd;1477 for (i = 0; i < srb->cmd->cmd_len; i++)1478 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);1479 }1480 no_cmd:1481 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,1482 DO_HWRESELECT | DO_DATALATCH);1483 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {1484 /* 1485 * If start_scsi return 1:1486 * we caught an interrupt (must be reset or reselection ... )1487 * : Let's process it first!1488 */1489 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",1490 srb->cmd, dcb->target_id, dcb->target_lun);1491 srb->state = SRB_READY;1492 free_tag(dcb, srb);1493 srb->msg_count = 0;1494 return_code = 1;1495 /* This IRQ should NOT get lost, as we did not acknowledge it */1496 } else {1497 /* 1498 * If start_scsi returns 0:1499 * we know that the SCSI processor is free1500 */1501 srb->scsi_phase = PH_BUS_FREE; /* initial phase */1502 dcb->active_srb = srb;1503 acb->active_dcb = dcb;1504 return_code = 0;1505 /* it's important for atn stop */1506 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,1507 DO_DATALATCH | DO_HWRESELECT);1508 /* SCSI command */1509 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);1510 }1511 return return_code;1512}1513 1514 1515#define DC395x_ENABLE_MSGOUT \1516 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \1517 srb->state |= SRB_MSGOUT1518 1519 1520/* abort command */1521static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,1522 struct ScsiReqBlk *srb)1523{1524 srb->msgout_buf[0] = ABORT;1525 srb->msg_count = 1;1526 DC395x_ENABLE_MSGOUT;1527 srb->state &= ~SRB_MSGIN;1528 srb->state |= SRB_MSGOUT;1529}1530 1531 1532/**1533 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to1534 * have been triggered for this card.1535 *1536 * @acb: a pointer to the adpter control block1537 * @scsi_status: the status return when we checked the card1538 **/1539static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,1540 u16 scsi_status)1541{1542 struct DeviceCtlBlk *dcb;1543 struct ScsiReqBlk *srb;1544 u16 phase;1545 u8 scsi_intstatus;1546 unsigned long flags;1547 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1548 u16 *);1549 1550 DC395x_LOCK_IO(acb->scsi_host, flags);1551 1552 /* This acknowledges the IRQ */1553 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);1554 if ((scsi_status & 0x2007) == 0x2002)1555 dprintkl(KERN_DEBUG,1556 "COP after COP completed? %04x\n", scsi_status);1557 if (debug_enabled(DBG_KG)) {1558 if (scsi_intstatus & INT_SELTIMEOUT)1559 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");1560 }1561 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */1562 1563 if (timer_pending(&acb->selto_timer))1564 del_timer(&acb->selto_timer);1565 1566 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {1567 disconnect(acb); /* bus free interrupt */1568 goto out_unlock;1569 }1570 if (scsi_intstatus & INT_RESELECTED) {1571 reselect(acb);1572 goto out_unlock;1573 }1574 if (scsi_intstatus & INT_SELECT) {1575 dprintkl(KERN_INFO, "Host does not support target mode!\n");1576 goto out_unlock;1577 }1578 if (scsi_intstatus & INT_SCSIRESET) {1579 scsi_reset_detect(acb);1580 goto out_unlock;1581 }1582 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {1583 dcb = acb->active_dcb;1584 if (!dcb) {1585 dprintkl(KERN_DEBUG,1586 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",1587 scsi_status, scsi_intstatus);1588 goto out_unlock;1589 }1590 srb = dcb->active_srb;1591 if (dcb->flag & ABORT_DEV_) {1592 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");1593 enable_msgout_abort(acb, srb);1594 }1595 1596 /* software sequential machine */1597 phase = (u16)srb->scsi_phase;1598 1599 /* 1600 * 62037 or 621371601 * call dc395x_scsi_phase0[]... "phase entry"1602 * handle every phase before start transfer1603 */1604 /* data_out_phase0, phase:0 */1605 /* data_in_phase0, phase:1 */1606 /* command_phase0, phase:2 */1607 /* status_phase0, phase:3 */1608 /* nop0, phase:4 PH_BUS_FREE .. initial phase */1609 /* nop0, phase:5 PH_BUS_FREE .. initial phase */1610 /* msgout_phase0, phase:6 */1611 /* msgin_phase0, phase:7 */1612 dc395x_statev = dc395x_scsi_phase0[phase];1613 dc395x_statev(acb, srb, &scsi_status);1614 1615 /* 1616 * if there were any exception occurred scsi_status1617 * will be modify to bus free phase new scsi_status1618 * transfer out from ... previous dc395x_statev1619 */1620 srb->scsi_phase = scsi_status & PHASEMASK;1621 phase = (u16)scsi_status & PHASEMASK;1622 1623 /* 1624 * call dc395x_scsi_phase1[]... "phase entry" handle1625 * every phase to do transfer1626 */1627 /* data_out_phase1, phase:0 */1628 /* data_in_phase1, phase:1 */1629 /* command_phase1, phase:2 */1630 /* status_phase1, phase:3 */1631 /* nop1, phase:4 PH_BUS_FREE .. initial phase */1632 /* nop1, phase:5 PH_BUS_FREE .. initial phase */1633 /* msgout_phase1, phase:6 */1634 /* msgin_phase1, phase:7 */1635 dc395x_statev = dc395x_scsi_phase1[phase];1636 dc395x_statev(acb, srb, &scsi_status);1637 }1638 out_unlock:1639 DC395x_UNLOCK_IO(acb->scsi_host, flags);1640}1641 1642 1643static irqreturn_t dc395x_interrupt(int irq, void *dev_id)1644{1645 struct AdapterCtlBlk *acb = dev_id;1646 u16 scsi_status;1647 u8 dma_status;1648 irqreturn_t handled = IRQ_NONE;1649 1650 /*1651 * Check for pending interrupt1652 */1653 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);1654 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);1655 if (scsi_status & SCSIINTERRUPT) {1656 /* interrupt pending - let's process it! */1657 dc395x_handle_interrupt(acb, scsi_status);1658 handled = IRQ_HANDLED;1659 }1660 else if (dma_status & 0x20) {1661 /* Error from the DMA engine */1662 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);1663#if 01664 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");1665 if (acb->active_dcb) {1666 acb->active_dcb-> flag |= ABORT_DEV_;1667 if (acb->active_dcb->active_srb)1668 enable_msgout_abort(acb, acb->active_dcb->active_srb);1669 }1670 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);1671#else1672 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");1673 acb = NULL;1674#endif1675 handled = IRQ_HANDLED;1676 }1677 1678 return handled;1679}1680 1681 1682static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,1683 u16 *pscsi_status)1684{1685 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);1686 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))1687 *pscsi_status = PH_BUS_FREE; /*.. initial phase */1688 1689 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */1690 srb->state &= ~SRB_MSGOUT;1691}1692 1693 1694static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,1695 u16 *pscsi_status)1696{1697 u16 i;1698 u8 *ptr;1699 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);1700 1701 clear_fifo(acb, "msgout_phase1");1702 if (!(srb->state & SRB_MSGOUT)) {1703 srb->state |= SRB_MSGOUT;1704 dprintkl(KERN_DEBUG,1705 "msgout_phase1: (0x%p) Phase unexpected\n",1706 srb->cmd); /* So what ? */1707 }1708 if (!srb->msg_count) {1709 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",1710 srb->cmd);1711 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, NOP);1712 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);1713 /* it's important for atn stop */1714 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);1715 return;1716 }1717 ptr = (u8 *)srb->msgout_buf;1718 for (i = 0; i < srb->msg_count; i++)1719 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);1720 srb->msg_count = 0;1721 if (srb->msgout_buf[0] == ABORT_TASK_SET)1722 srb->state = SRB_ABORT_SENT;1723 1724 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);1725}1726 1727 1728static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,1729 u16 *pscsi_status)1730{1731 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);1732 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);1733}1734 1735 1736static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,1737 u16 *pscsi_status)1738{1739 struct DeviceCtlBlk *dcb;1740 u8 *ptr;1741 u16 i;1742 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);1743 1744 clear_fifo(acb, "command_phase1");1745 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);1746 if (!(srb->flag & AUTO_REQSENSE)) {1747 ptr = (u8 *)srb->cmd->cmnd;1748 for (i = 0; i < srb->cmd->cmd_len; i++) {1749 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);1750 ptr++;1751 }1752 } else {1753 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);1754 dcb = acb->active_dcb;1755 /* target id */1756 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));1757 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);1758 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);1759 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);1760 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);1761 }1762 srb->state |= SRB_COMMAND;1763 /* it's important for atn stop */1764 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);1765 /* SCSI command */1766 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);1767}1768 1769 1770/*1771 * Verify that the remaining space in the hw sg lists is the same as1772 * the count of remaining bytes in srb->total_xfer_length1773 */1774static void sg_verify_length(struct ScsiReqBlk *srb)1775{1776 if (debug_enabled(DBG_SG)) {1777 unsigned len = 0;1778 unsigned idx = srb->sg_index;1779 struct SGentry *psge = srb->segment_x + idx;1780 for (; idx < srb->sg_count; psge++, idx++)1781 len += psge->length;1782 if (len != srb->total_xfer_length)1783 dprintkdbg(DBG_SG,1784 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",1785 srb->total_xfer_length, len);1786 } 1787}1788 1789 1790/*1791 * Compute the next Scatter Gather list index and adjust its length1792 * and address if necessary1793 */1794static void sg_update_list(struct ScsiReqBlk *srb, u32 left)1795{1796 u8 idx;1797 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */1798 struct SGentry *psge = srb->segment_x + srb->sg_index;1799 1800 dprintkdbg(DBG_0,1801 "sg_update_list: Transferred %i of %i bytes, %i remain\n",1802 xferred, srb->total_xfer_length, left);1803 if (xferred == 0) {1804 /* nothing to update since we did not transfer any data */1805 return;1806 }1807 1808 sg_verify_length(srb);1809 srb->total_xfer_length = left; /* update remaining count */1810 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {1811 if (xferred >= psge->length) {1812 /* Complete SG entries done */1813 xferred -= psge->length;1814 } else {1815 /* Partial SG entry done */1816 dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,1817 srb->sg_bus_addr, SEGMENTX_LEN,1818 DMA_TO_DEVICE);1819 psge->length -= xferred;1820 psge->address += xferred;1821 srb->sg_index = idx;1822 dma_sync_single_for_device(&srb->dcb->acb->dev->dev,1823 srb->sg_bus_addr, SEGMENTX_LEN,1824 DMA_TO_DEVICE);1825 break;1826 }1827 psge++;1828 }1829 sg_verify_length(srb);1830}1831 1832 1833/*1834 * We have transferred a single byte (PIO mode?) and need to update1835 * the count of bytes remaining (total_xfer_length) and update the sg1836 * entry to either point to next byte in the current sg entry, or of1837 * already at the end to point to the start of the next sg entry1838 */1839static void sg_subtract_one(struct ScsiReqBlk *srb)1840{1841 sg_update_list(srb, srb->total_xfer_length - 1);1842}1843 1844 1845/* 1846 * cleanup_after_transfer1847 * 1848 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished1849 * KG: Currently called from StatusPhase1 ()1850 * Should probably also be called from other places1851 * Best might be to call it in DataXXPhase0, if new phase will differ 1852 */1853static void cleanup_after_transfer(struct AdapterCtlBlk *acb,1854 struct ScsiReqBlk *srb)1855{1856 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */1857 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */1858 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))1859 clear_fifo(acb, "cleanup/in");1860 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))1861 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);1862 } else { /* write */1863 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))1864 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);1865 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))1866 clear_fifo(acb, "cleanup/out");1867 }1868 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);1869}1870 1871 1872/*1873 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO1874 * Seems to be needed for unknown reasons; could be a hardware bug :-(1875 */1876#define DC395x_LASTPIO 41877 1878 1879static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,1880 u16 *pscsi_status)1881{1882 struct DeviceCtlBlk *dcb = srb->dcb;1883 u16 scsi_status = *pscsi_status;1884 u32 d_left_counter = 0;1885 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",1886 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);1887 1888 /*1889 * KG: We need to drain the buffers before we draw any conclusions!1890 * This means telling the DMA to push the rest into SCSI, telling1891 * SCSI to push the rest to the bus.1892 * However, the device might have been the one to stop us (phase1893 * change), and the data in transit just needs to be accounted so1894 * it can be retransmitted.)1895 */1896 /* 1897 * KG: Stop DMA engine pushing more data into the SCSI FIFO1898 * If we need more data, the DMA SG list will be freshly set up, anyway1899 */1900 dprintkdbg(DBG_PIO, "data_out_phase0: "1901 "DMA{fifocnt=0x%02x fifostat=0x%02x} "1902 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",1903 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),1904 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),1905 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),1906 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,1907 srb->total_xfer_length);1908 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);1909 1910 if (!(srb->state & SRB_XFERPAD)) {1911 if (scsi_status & PARITYERROR)1912 srb->status |= PARITY_ERROR;1913 1914 /*1915 * KG: Right, we can't just rely on the SCSI_COUNTER, because this1916 * is the no of bytes it got from the DMA engine not the no it 1917 * transferred successfully to the device. (And the difference could1918 * be as much as the FIFO size, I guess ...)1919 */1920 if (!(scsi_status & SCSIXFERDONE)) {1921 /*1922 * when data transfer from DMA FIFO to SCSI FIFO1923 * if there was some data left in SCSI FIFO1924 */1925 d_left_counter =1926 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &1927 0x1F);1928 if (dcb->sync_period & WIDE_SYNC)1929 d_left_counter <<= 1;1930 1931 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"1932 "SCSI{fifocnt=0x%02x cnt=0x%08x} "1933 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",1934 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),1935 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",1936 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),1937 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),1938 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),1939 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),1940 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));1941 }1942 /*1943 * calculate all the residue data that not yet tranfered1944 * SCSI transfer counter + left in SCSI FIFO data1945 *1946 * .....TRM_S1040_SCSI_COUNTER (24bits)1947 * The counter always decrement by one for every SCSI byte transfer.1948 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)1949 * The counter is SCSI FIFO offset counter (in units of bytes or! words)1950 */1951 if (srb->total_xfer_length > DC395x_LASTPIO)1952 d_left_counter +=1953 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);1954 1955 /* Is this a good idea? */1956 /*clear_fifo(acb, "DOP1"); */1957 /* KG: What is this supposed to be useful for? WIDE padding stuff? */1958 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC1959 && scsi_bufflen(srb->cmd) % 2) {1960 d_left_counter = 0;1961 dprintkl(KERN_INFO,1962 "data_out_phase0: Discard 1 byte (0x%02x)\n",1963 scsi_status);1964 }1965 /*1966 * KG: Oops again. Same thinko as above: The SCSI might have been1967 * faster than the DMA engine, so that it ran out of data.1968 * In that case, we have to do just nothing! 1969 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?1970 */1971 /*1972 * KG: This is nonsense: We have been WRITING data to the bus1973 * If the SCSI engine has no bytes left, how should the DMA engine?1974 */1975 if (d_left_counter == 0) {1976 srb->total_xfer_length = 0;1977 } else {1978 /*1979 * if transfer not yet complete1980 * there were some data residue in SCSI FIFO or1981 * SCSI transfer counter not empty1982 */1983 long oldxferred =1984 srb->total_xfer_length - d_left_counter;1985 const int diff =1986 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;1987 sg_update_list(srb, d_left_counter);1988 /* KG: Most ugly hack! Apparently, this works around a chip bug */1989 if ((srb->segment_x[srb->sg_index].length ==1990 diff && scsi_sg_count(srb->cmd))1991 || ((oldxferred & ~PAGE_MASK) ==1992 (PAGE_SIZE - diff))1993 ) {1994 dprintkl(KERN_INFO, "data_out_phase0: "1995 "Work around chip bug (%i)?\n", diff);1996 d_left_counter =1997 srb->total_xfer_length - diff;1998 sg_update_list(srb, d_left_counter);1999 /*srb->total_xfer_length -= diff; */2000 /*srb->virt_addr += diff; */2001 /*if (srb->cmd->use_sg) */2002 /* srb->sg_index++; */2003 }2004 }2005 }2006 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {2007 cleanup_after_transfer(acb, srb);2008 }2009}2010 2011 2012static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2013 u16 *pscsi_status)2014{2015 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",2016 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);2017 clear_fifo(acb, "data_out_phase1");2018 /* do prepare before transfer when data out phase */2019 data_io_transfer(acb, srb, XFERDATAOUT);2020}2021 2022static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2023 u16 *pscsi_status)2024{2025 u16 scsi_status = *pscsi_status;2026 2027 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",2028 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);2029 2030 /*2031 * KG: DataIn is much more tricky than DataOut. When the device is finished2032 * and switches to another phase, the SCSI engine should be finished too.2033 * But: There might still be bytes left in its FIFO to be fetched by the DMA2034 * engine and transferred to memory.2035 * We should wait for the FIFOs to be emptied by that (is there any way to 2036 * enforce this?) and then stop the DMA engine, because it might think, that2037 * there are more bytes to follow. Yes, the device might disconnect prior to2038 * having all bytes transferred! 2039 * Also we should make sure that all data from the DMA engine buffer's really2040 * made its way to the system memory! Some documentation on this would not2041 * seem to be a bad idea, actually.2042 */2043 if (!(srb->state & SRB_XFERPAD)) {2044 u32 d_left_counter;2045 unsigned int sc, fc;2046 2047 if (scsi_status & PARITYERROR) {2048 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "2049 "Parity Error\n", srb->cmd);2050 srb->status |= PARITY_ERROR;2051 }2052 /*2053 * KG: We should wait for the DMA FIFO to be empty ...2054 * but: it would be better to wait first for the SCSI FIFO and then the2055 * the DMA FIFO to become empty? How do we know, that the device not already2056 * sent data to the FIFO in a MsgIn phase, eg.?2057 */2058 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {2059#if 02060 int ctr = 6000000;2061 dprintkl(KERN_DEBUG,2062 "DIP0: Wait for DMA FIFO to flush ...\n");2063 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */2064 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */2065 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */2066 while (!2067 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &2068 0x80) && --ctr);2069 if (ctr < 6000000 - 1)2070 dprintkl(KERN_DEBUG2071 "DIP0: Had to wait for DMA ...\n");2072 if (!ctr)2073 dprintkl(KERN_ERR,2074 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");2075 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */2076#endif2077 dprintkdbg(DBG_KG, "data_in_phase0: "2078 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",2079 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),2080 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));2081 }2082 /* Now: Check remainig data: The SCSI counters should tell us ... */2083 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);2084 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);2085 d_left_counter = sc + ((fc & 0x1f)2086 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :2087 0));2088 dprintkdbg(DBG_KG, "data_in_phase0: "2089 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "2090 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "2091 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",2092 fc,2093 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",2094 sc,2095 fc,2096 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),2097 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),2098 srb->total_xfer_length, d_left_counter);2099#if DC395x_LASTPIO2100 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */2101 if (d_left_counter2102 && srb->total_xfer_length <= DC395x_LASTPIO) {2103 size_t left_io = srb->total_xfer_length;2104 2105 /*u32 addr = (srb->segment_x[srb->sg_index].address); */2106 /*sg_update_list (srb, d_left_counter); */2107 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "2108 "for remaining %i bytes:",2109 fc & 0x1f,2110 (srb->dcb->sync_period & WIDE_SYNC) ?2111 "words" : "bytes",2112 srb->total_xfer_length);2113 if (srb->dcb->sync_period & WIDE_SYNC)2114 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,2115 CFG2_WIDEFIFO);2116 while (left_io) {2117 unsigned char *virt, *base = NULL;2118 unsigned long flags = 0;2119 size_t len = left_io;2120 size_t offset = srb->request_length - left_io;2121 2122 local_irq_save(flags);2123 /* Assumption: it's inside one page as it's at most 4 bytes and2124 I just assume it's on a 4-byte boundary */2125 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),2126 srb->sg_count, &offset, &len);2127 virt = base + offset;2128 2129 left_io -= len;2130 2131 while (len) {2132 u8 byte;2133 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2134 *virt++ = byte;2135 2136 if (debug_enabled(DBG_PIO))2137 printk(" %02x", byte);2138 2139 d_left_counter--;2140 sg_subtract_one(srb);2141 2142 len--;2143 2144 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);2145 2146 if (fc == 0x40) {2147 left_io = 0;2148 break;2149 }2150 }2151 2152 WARN_ON((fc != 0x40) == !d_left_counter);2153 2154 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {2155 /* Read the last byte ... */2156 if (srb->total_xfer_length > 0) {2157 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2158 2159 *virt++ = byte;2160 srb->total_xfer_length--;2161 if (debug_enabled(DBG_PIO))2162 printk(" %02x", byte);2163 }2164 2165 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);2166 }2167 2168 scsi_kunmap_atomic_sg(base);2169 local_irq_restore(flags);2170 }2171 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */2172 /*srb->total_xfer_length = 0; */2173 if (debug_enabled(DBG_PIO))2174 printk("\n");2175 }2176#endif /* DC395x_LASTPIO */2177 2178#if 02179 /*2180 * KG: This was in DATAOUT. Does it also belong here?2181 * Nobody seems to know what counter and fifo_cnt count exactly ...2182 */2183 if (!(scsi_status & SCSIXFERDONE)) {2184 /*2185 * when data transfer from DMA FIFO to SCSI FIFO2186 * if there was some data left in SCSI FIFO2187 */2188 d_left_counter =2189 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &2190 0x1F);2191 if (srb->dcb->sync_period & WIDE_SYNC)2192 d_left_counter <<= 1;2193 /*2194 * if WIDE scsi SCSI FIFOCNT unit is word !!!2195 * so need to *= 22196 * KG: Seems to be correct ...2197 */2198 }2199#endif2200 /* KG: This should not be needed any more! */2201 if (d_left_counter == 02202 || (scsi_status & SCSIXFERCNT_2_ZERO)) {2203#if 02204 int ctr = 6000000;2205 u8 TempDMAstatus;2206 do {2207 TempDMAstatus =2208 DC395x_read8(acb, TRM_S1040_DMA_STATUS);2209 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);2210 if (!ctr)2211 dprintkl(KERN_ERR,2212 "Deadlock in DataInPhase0 waiting for DMA!!\n");2213 srb->total_xfer_length = 0;2214#endif2215 srb->total_xfer_length = d_left_counter;2216 } else { /* phase changed */2217 /*2218 * parsing the case:2219 * when a transfer not yet complete 2220 * but be disconnected by target2221 * if transfer not yet complete2222 * there were some data residue in SCSI FIFO or2223 * SCSI transfer counter not empty2224 */2225 sg_update_list(srb, d_left_counter);2226 }2227 }2228 /* KG: The target may decide to disconnect: Empty FIFO before! */2229 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {2230 cleanup_after_transfer(acb, srb);2231 }2232}2233 2234 2235static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2236 u16 *pscsi_status)2237{2238 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",2239 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);2240 data_io_transfer(acb, srb, XFERDATAIN);2241}2242 2243 2244static void data_io_transfer(struct AdapterCtlBlk *acb, 2245 struct ScsiReqBlk *srb, u16 io_dir)2246{2247 struct DeviceCtlBlk *dcb = srb->dcb;2248 u8 bval;2249 dprintkdbg(DBG_0,2250 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",2251 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,2252 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),2253 srb->total_xfer_length, srb->sg_index, srb->sg_count);2254 if (srb == acb->tmp_srb)2255 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");2256 if (srb->sg_index >= srb->sg_count) {2257 /* can't happen? out of bounds error */2258 return;2259 }2260 2261 if (srb->total_xfer_length > DC395x_LASTPIO) {2262 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);2263 /*2264 * KG: What should we do: Use SCSI Cmd 0x90/0x92?2265 * Maybe, even ABORTXFER would be appropriate2266 */2267 if (dma_status & XFERPENDING) {2268 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "2269 "Expect trouble!\n");2270 dump_register_info(acb, dcb, srb);2271 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);2272 }2273 /* clear_fifo(acb, "IO"); */2274 /* 2275 * load what physical address of Scatter/Gather list table2276 * want to be transfer2277 */2278 srb->state |= SRB_DATA_XFER;2279 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);2280 if (scsi_sg_count(srb->cmd)) { /* with S/G */2281 io_dir |= DMACMD_SG;2282 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,2283 srb->sg_bus_addr +2284 sizeof(struct SGentry) *2285 srb->sg_index);2286 /* load how many bytes in the sg list table */2287 DC395x_write32(acb, TRM_S1040_DMA_XCNT,2288 ((u32)(srb->sg_count -2289 srb->sg_index) << 3));2290 } else { /* without S/G */2291 io_dir &= ~DMACMD_SG;2292 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,2293 srb->segment_x[0].address);2294 DC395x_write32(acb, TRM_S1040_DMA_XCNT,2295 srb->segment_x[0].length);2296 }2297 /* load total transfer length (24bits) max value 16Mbyte */2298 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,2299 srb->total_xfer_length);2300 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2301 if (io_dir & DMACMD_DIR) { /* read */2302 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,2303 SCMD_DMA_IN);2304 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);2305 } else {2306 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);2307 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,2308 SCMD_DMA_OUT);2309 }2310 2311 }2312#if DC395x_LASTPIO2313 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */2314 /* 2315 * load what physical address of Scatter/Gather list table2316 * want to be transfer2317 */2318 srb->state |= SRB_DATA_XFER;2319 /* load total transfer length (24bits) max value 16Mbyte */2320 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,2321 srb->total_xfer_length);2322 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2323 if (io_dir & DMACMD_DIR) { /* read */2324 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,2325 SCMD_FIFO_IN);2326 } else { /* write */2327 int ln = srb->total_xfer_length;2328 size_t left_io = srb->total_xfer_length;2329 2330 if (srb->dcb->sync_period & WIDE_SYNC)2331 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,2332 CFG2_WIDEFIFO);2333 2334 while (left_io) {2335 unsigned char *virt, *base = NULL;2336 unsigned long flags = 0;2337 size_t len = left_io;2338 size_t offset = srb->request_length - left_io;2339 2340 local_irq_save(flags);2341 /* Again, max 4 bytes */2342 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),2343 srb->sg_count, &offset, &len);2344 virt = base + offset;2345 2346 left_io -= len;2347 2348 while (len--) {2349 if (debug_enabled(DBG_PIO))2350 printk(" %02x", *virt);2351 2352 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);2353 2354 sg_subtract_one(srb);2355 }2356 2357 scsi_kunmap_atomic_sg(base);2358 local_irq_restore(flags);2359 }2360 if (srb->dcb->sync_period & WIDE_SYNC) {2361 if (ln % 2) {2362 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);2363 if (debug_enabled(DBG_PIO))2364 printk(" |00");2365 }2366 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);2367 }2368 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */2369 if (debug_enabled(DBG_PIO))2370 printk("\n");2371 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,2372 SCMD_FIFO_OUT);2373 }2374 }2375#endif /* DC395x_LASTPIO */2376 else { /* xfer pad */2377 if (srb->sg_count) {2378 srb->adapter_status = H_OVER_UNDER_RUN;2379 srb->status |= OVER_RUN;2380 }2381 /*2382 * KG: despite the fact that we are using 16 bits I/O ops2383 * the SCSI FIFO is only 8 bits according to the docs2384 * (we can set bit 1 in 0x8f to serialize FIFO access ...)2385 */2386 if (dcb->sync_period & WIDE_SYNC) {2387 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);2388 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,2389 CFG2_WIDEFIFO);2390 if (io_dir & DMACMD_DIR) {2391 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2392 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2393 } else {2394 /* Danger, Robinson: If you find KGs2395 * scattered over the wide disk, the driver2396 * or chip is to blame :-( */2397 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');2398 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');2399 }2400 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);2401 } else {2402 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);2403 /* Danger, Robinson: If you find a collection of Ks on your disk2404 * something broke :-( */2405 if (io_dir & DMACMD_DIR)2406 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2407 else2408 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');2409 }2410 srb->state |= SRB_XFERPAD;2411 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2412 /* SCSI command */2413 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;2414 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);2415 }2416}2417 2418 2419static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2420 u16 *pscsi_status)2421{2422 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",2423 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);2424 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2425 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */2426 srb->state = SRB_COMPLETED;2427 *pscsi_status = PH_BUS_FREE; /*.. initial phase */2428 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2429 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);2430}2431 2432 2433static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2434 u16 *pscsi_status)2435{2436 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",2437 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);2438 srb->state = SRB_STATUS;2439 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2440 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);2441}2442 2443 2444/* Check if the message is complete */2445static inline u8 msgin_completed(u8 * msgbuf, u32 len)2446{2447 if (*msgbuf == EXTENDED_MESSAGE) {2448 if (len < 2)2449 return 0;2450 if (len < msgbuf[1] + 2)2451 return 0;2452 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */2453 if (len < 2)2454 return 0;2455 return 1;2456}2457 2458/* reject_msg */2459static inline void msgin_reject(struct AdapterCtlBlk *acb,2460 struct ScsiReqBlk *srb)2461{2462 srb->msgout_buf[0] = MESSAGE_REJECT;2463 srb->msg_count = 1;2464 DC395x_ENABLE_MSGOUT;2465 srb->state &= ~SRB_MSGIN;2466 srb->state |= SRB_MSGOUT;2467 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",2468 srb->msgin_buf[0],2469 srb->dcb->target_id, srb->dcb->target_lun);2470}2471 2472 2473static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,2474 struct DeviceCtlBlk *dcb, u8 tag)2475{2476 struct ScsiReqBlk *srb = NULL;2477 struct ScsiReqBlk *i;2478 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",2479 srb->cmd, tag, srb);2480 2481 if (!(dcb->tag_mask & (1 << tag)))2482 dprintkl(KERN_DEBUG,2483 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",2484 dcb->tag_mask, tag);2485 2486 if (list_empty(&dcb->srb_going_list))2487 goto mingx0;2488 list_for_each_entry(i, &dcb->srb_going_list, list) {2489 if (i->tag_number == tag) {2490 srb = i;2491 break;2492 }2493 }2494 if (!srb)2495 goto mingx0;2496 2497 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",2498 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);2499 if (dcb->flag & ABORT_DEV_) {2500 /*srb->state = SRB_ABORT_SENT; */2501 enable_msgout_abort(acb, srb);2502 }2503 2504 if (!(srb->state & SRB_DISCONNECT))2505 goto mingx0;2506 2507 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);2508 srb->state |= dcb->active_srb->state;2509 srb->state |= SRB_DATA_XFER;2510 dcb->active_srb = srb;2511 /* How can we make the DORS happy? */2512 return srb;2513 2514 mingx0:2515 srb = acb->tmp_srb;2516 srb->state = SRB_UNEXPECT_RESEL;2517 dcb->active_srb = srb;2518 srb->msgout_buf[0] = ABORT_TASK;2519 srb->msg_count = 1;2520 DC395x_ENABLE_MSGOUT;2521 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);2522 return srb;2523}2524 2525 2526static inline void reprogram_regs(struct AdapterCtlBlk *acb,2527 struct DeviceCtlBlk *dcb)2528{2529 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);2530 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);2531 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);2532 set_xfer_rate(acb, dcb);2533}2534 2535 2536/* set async transfer mode */2537static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)2538{2539 struct DeviceCtlBlk *dcb = srb->dcb;2540 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",2541 dcb->target_id, dcb->target_lun);2542 2543 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);2544 dcb->sync_mode |= SYNC_NEGO_DONE;2545 /*dcb->sync_period &= 0; */2546 dcb->sync_offset = 0;2547 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */2548 srb->state &= ~SRB_DO_SYNC_NEGO;2549 reprogram_regs(acb, dcb);2550 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)2551 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {2552 build_wdtr(acb, dcb, srb);2553 DC395x_ENABLE_MSGOUT;2554 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");2555 }2556}2557 2558 2559/* set sync transfer mode */2560static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)2561{2562 struct DeviceCtlBlk *dcb = srb->dcb;2563 u8 bval;2564 int fact;2565 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "2566 "(%02i.%01i MHz) Offset %i\n",2567 dcb->target_id, srb->msgin_buf[3] << 2,2568 (250 / srb->msgin_buf[3]),2569 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],2570 srb->msgin_buf[4]);2571 2572 if (srb->msgin_buf[4] > 15)2573 srb->msgin_buf[4] = 15;2574 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))2575 dcb->sync_offset = 0;2576 else if (dcb->sync_offset == 0)2577 dcb->sync_offset = srb->msgin_buf[4];2578 if (srb->msgin_buf[4] > dcb->sync_offset)2579 srb->msgin_buf[4] = dcb->sync_offset;2580 else2581 dcb->sync_offset = srb->msgin_buf[4];2582 bval = 0;2583 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]2584 || dcb->min_nego_period >2585 clock_period[bval]))2586 bval++;2587 if (srb->msgin_buf[3] < clock_period[bval])2588 dprintkl(KERN_INFO,2589 "msgin_set_sync: Increase sync nego period to %ins\n",2590 clock_period[bval] << 2);2591 srb->msgin_buf[3] = clock_period[bval];2592 dcb->sync_period &= 0xf0;2593 dcb->sync_period |= ALT_SYNC | bval;2594 dcb->min_nego_period = srb->msgin_buf[3];2595 2596 if (dcb->sync_period & WIDE_SYNC)2597 fact = 500;2598 else2599 fact = 250;2600 2601 dprintkl(KERN_INFO,2602 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",2603 dcb->target_id, (fact == 500) ? "Wide16" : "",2604 dcb->min_nego_period << 2, dcb->sync_offset,2605 (fact / dcb->min_nego_period),2606 ((fact % dcb->min_nego_period) * 10 +2607 dcb->min_nego_period / 2) / dcb->min_nego_period);2608 2609 if (!(srb->state & SRB_DO_SYNC_NEGO)) {2610 /* Reply with corrected SDTR Message */2611 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",2612 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);2613 2614 memcpy(srb->msgout_buf, srb->msgin_buf, 5);2615 srb->msg_count = 5;2616 DC395x_ENABLE_MSGOUT;2617 dcb->sync_mode |= SYNC_NEGO_DONE;2618 } else {2619 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)2620 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {2621 build_wdtr(acb, dcb, srb);2622 DC395x_ENABLE_MSGOUT;2623 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");2624 }2625 }2626 srb->state &= ~SRB_DO_SYNC_NEGO;2627 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;2628 2629 reprogram_regs(acb, dcb);2630}2631 2632 2633static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,2634 struct ScsiReqBlk *srb)2635{2636 struct DeviceCtlBlk *dcb = srb->dcb;2637 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);2638 2639 dcb->sync_period &= ~WIDE_SYNC;2640 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);2641 dcb->sync_mode |= WIDE_NEGO_DONE;2642 srb->state &= ~SRB_DO_WIDE_NEGO;2643 reprogram_regs(acb, dcb);2644 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)2645 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {2646 build_sdtr(acb, dcb, srb);2647 DC395x_ENABLE_MSGOUT;2648 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");2649 }2650}2651 2652static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)2653{2654 struct DeviceCtlBlk *dcb = srb->dcb;2655 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO2656 && acb->config & HCC_WIDE_CARD) ? 1 : 0;2657 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);2658 2659 if (srb->msgin_buf[3] > wide)2660 srb->msgin_buf[3] = wide;2661 /* Completed */2662 if (!(srb->state & SRB_DO_WIDE_NEGO)) {2663 dprintkl(KERN_DEBUG,2664 "msgin_set_wide: Wide nego initiated <%02i>\n",2665 dcb->target_id);2666 memcpy(srb->msgout_buf, srb->msgin_buf, 4);2667 srb->msg_count = 4;2668 srb->state |= SRB_DO_WIDE_NEGO;2669 DC395x_ENABLE_MSGOUT;2670 }2671 2672 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);2673 if (srb->msgin_buf[3] > 0)2674 dcb->sync_period |= WIDE_SYNC;2675 else2676 dcb->sync_period &= ~WIDE_SYNC;2677 srb->state &= ~SRB_DO_WIDE_NEGO;2678 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */2679 dprintkdbg(DBG_1,2680 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",2681 (8 << srb->msgin_buf[3]), dcb->target_id);2682 reprogram_regs(acb, dcb);2683 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)2684 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {2685 build_sdtr(acb, dcb, srb);2686 DC395x_ENABLE_MSGOUT;2687 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");2688 }2689}2690 2691 2692/*2693 * extended message codes:2694 *2695 * code description2696 *2697 * 02h Reserved2698 * 00h MODIFY DATA POINTER2699 * 01h SYNCHRONOUS DATA TRANSFER REQUEST2700 * 03h WIDE DATA TRANSFER REQUEST2701 * 04h - 7Fh Reserved2702 * 80h - FFh Vendor specific2703 */2704static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2705 u16 *pscsi_status)2706{2707 struct DeviceCtlBlk *dcb = acb->active_dcb;2708 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);2709 2710 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);2711 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {2712 /* Now eval the msg */2713 switch (srb->msgin_buf[0]) {2714 case DISCONNECT:2715 srb->state = SRB_DISCONNECT;2716 break;2717 2718 case SIMPLE_QUEUE_TAG:2719 case HEAD_OF_QUEUE_TAG:2720 case ORDERED_QUEUE_TAG:2721 srb =2722 msgin_qtag(acb, dcb,2723 srb->msgin_buf[1]);2724 break;2725 2726 case MESSAGE_REJECT:2727 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,2728 DO_CLRATN | DO_DATALATCH);2729 /* A sync nego message was rejected ! */2730 if (srb->state & SRB_DO_SYNC_NEGO) {2731 msgin_set_async(acb, srb);2732 break;2733 }2734 /* A wide nego message was rejected ! */2735 if (srb->state & SRB_DO_WIDE_NEGO) {2736 msgin_set_nowide(acb, srb);2737 break;2738 }2739 enable_msgout_abort(acb, srb);2740 /*srb->state |= SRB_ABORT_SENT */2741 break;2742 2743 case EXTENDED_MESSAGE:2744 /* SDTR */2745 if (srb->msgin_buf[1] == 32746 && srb->msgin_buf[2] == EXTENDED_SDTR) {2747 msgin_set_sync(acb, srb);2748 break;2749 }2750 /* WDTR */2751 if (srb->msgin_buf[1] == 22752 && srb->msgin_buf[2] == EXTENDED_WDTR2753 && srb->msgin_buf[3] <= 2) { /* sanity check ... */2754 msgin_set_wide(acb, srb);2755 break;2756 }2757 msgin_reject(acb, srb);2758 break;2759 2760 case IGNORE_WIDE_RESIDUE:2761 /* Discard wide residual */2762 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");2763 break;2764 2765 case COMMAND_COMPLETE:2766 /* nothing has to be done */2767 break;2768 2769 case SAVE_POINTERS:2770 /*2771 * SAVE POINTER may be ignored as we have the struct2772 * ScsiReqBlk* associated with the scsi command.2773 */2774 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "2775 "SAVE POINTER rem=%i Ignore\n",2776 srb->cmd, srb->total_xfer_length);2777 break;2778 2779 case RESTORE_POINTERS:2780 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");2781 break;2782 2783 case ABORT:2784 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "2785 "<%02i-%i> ABORT msg\n",2786 srb->cmd, dcb->target_id,2787 dcb->target_lun);2788 dcb->flag |= ABORT_DEV_;2789 enable_msgout_abort(acb, srb);2790 break;2791 2792 default:2793 /* reject unknown messages */2794 if (srb->msgin_buf[0] & IDENTIFY_BASE) {2795 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");2796 srb->msg_count = 1;2797 srb->msgout_buf[0] = dcb->identify_msg;2798 DC395x_ENABLE_MSGOUT;2799 srb->state |= SRB_MSGOUT;2800 /*break; */2801 }2802 msgin_reject(acb, srb);2803 }2804 2805 /* Clear counter and MsgIn state */2806 srb->state &= ~SRB_MSGIN;2807 acb->msg_len = 0;2808 }2809 *pscsi_status = PH_BUS_FREE;2810 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */2811 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);2812}2813 2814 2815static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2816 u16 *pscsi_status)2817{2818 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);2819 clear_fifo(acb, "msgin_phase1");2820 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);2821 if (!(srb->state & SRB_MSGIN)) {2822 srb->state &= ~SRB_DISCONNECT;2823 srb->state |= SRB_MSGIN;2824 }2825 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2826 /* SCSI command */2827 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);2828}2829 2830 2831static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2832 u16 *pscsi_status)2833{2834}2835 2836 2837static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,2838 u16 *pscsi_status)2839{2840}2841 2842 2843static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)2844{2845 struct DeviceCtlBlk *i;2846 2847 /* set all lun device's period, offset */2848 if (dcb->identify_msg & 0x07)2849 return;2850 2851 if (acb->scan_devices) {2852 current_sync_offset = dcb->sync_offset;2853 return;2854 }2855 2856 list_for_each_entry(i, &acb->dcb_list, list)2857 if (i->target_id == dcb->target_id) {2858 i->sync_period = dcb->sync_period;2859 i->sync_offset = dcb->sync_offset;2860 i->sync_mode = dcb->sync_mode;2861 i->min_nego_period = dcb->min_nego_period;2862 }2863}2864 2865 2866static void disconnect(struct AdapterCtlBlk *acb)2867{2868 struct DeviceCtlBlk *dcb = acb->active_dcb;2869 struct ScsiReqBlk *srb;2870 2871 if (!dcb) {2872 dprintkl(KERN_ERR, "disconnect: No such device\n");2873 udelay(500);2874 /* Suspend queue for a while */2875 acb->last_reset =2876 jiffies + HZ / 2 +2877 HZ * acb->eeprom.delay_time;2878 clear_fifo(acb, "disconnectEx");2879 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);2880 return;2881 }2882 srb = dcb->active_srb;2883 acb->active_dcb = NULL;2884 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);2885 2886 srb->scsi_phase = PH_BUS_FREE; /* initial phase */2887 clear_fifo(acb, "disconnect");2888 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);2889 if (srb->state & SRB_UNEXPECT_RESEL) {2890 dprintkl(KERN_ERR,2891 "disconnect: Unexpected reselection <%02i-%i>\n",2892 dcb->target_id, dcb->target_lun);2893 srb->state = 0;2894 waiting_process_next(acb);2895 } else if (srb->state & SRB_ABORT_SENT) {2896 dcb->flag &= ~ABORT_DEV_;2897 acb->last_reset = jiffies + HZ / 2 + 1;2898 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");2899 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);2900 waiting_process_next(acb);2901 } else {2902 if ((srb->state & (SRB_START_ + SRB_MSGOUT))2903 || !(srb->2904 state & (SRB_DISCONNECT | SRB_COMPLETED))) {2905 /*2906 * Selection time out 2907 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)2908 */2909 /* Unexp. Disc / Sel Timeout */2910 if (srb->state != SRB_START_2911 && srb->state != SRB_MSGOUT) {2912 srb->state = SRB_READY;2913 dprintkl(KERN_DEBUG,2914 "disconnect: (0x%p) Unexpected\n",2915 srb->cmd);2916 srb->target_status = SCSI_STAT_SEL_TIMEOUT;2917 goto disc1;2918 } else {2919 /* Normal selection timeout */2920 dprintkdbg(DBG_KG, "disconnect: (0x%p) "2921 "<%02i-%i> SelTO\n", srb->cmd,2922 dcb->target_id, dcb->target_lun);2923 if (srb->retry_count++ > DC395x_MAX_RETRIES2924 || acb->scan_devices) {2925 srb->target_status =2926 SCSI_STAT_SEL_TIMEOUT;2927 goto disc1;2928 }2929 free_tag(dcb, srb);2930 list_move(&srb->list, &dcb->srb_waiting_list);2931 dprintkdbg(DBG_KG,2932 "disconnect: (0x%p) Retry\n",2933 srb->cmd);2934 waiting_set_timer(acb, HZ / 20);2935 }2936 } else if (srb->state & SRB_DISCONNECT) {2937 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);2938 /*2939 * SRB_DISCONNECT (This is what we expect!)2940 */2941 if (bval & 0x40) {2942 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "2943 " 0x%02x: ACK set! Other controllers?\n",2944 bval);2945 /* It could come from another initiator, therefore don't do much ! */2946 } else2947 waiting_process_next(acb);2948 } else if (srb->state & SRB_COMPLETED) {2949 disc1:2950 /*2951 ** SRB_COMPLETED2952 */2953 free_tag(dcb, srb);2954 dcb->active_srb = NULL;2955 srb->state = SRB_FREE;2956 srb_done(acb, dcb, srb);2957 }2958 }2959}2960 2961 2962static void reselect(struct AdapterCtlBlk *acb)2963{2964 struct DeviceCtlBlk *dcb = acb->active_dcb;2965 struct ScsiReqBlk *srb = NULL;2966 u16 rsel_tar_lun_id;2967 u8 id, lun;2968 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);2969 2970 clear_fifo(acb, "reselect");2971 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */2972 /* Read Reselected Target ID and LUN */2973 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);2974 if (dcb) { /* Arbitration lost but Reselection win */2975 srb = dcb->active_srb;2976 if (!srb) {2977 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "2978 "but active_srb == NULL\n");2979 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */2980 return;2981 }2982 /* Why the if ? */2983 if (!acb->scan_devices) {2984 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "2985 "Arb lost but Resel win rsel=%i stat=0x%04x\n",2986 srb->cmd, dcb->target_id,2987 dcb->target_lun, rsel_tar_lun_id,2988 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));2989 /*srb->state |= SRB_DISCONNECT; */2990 2991 srb->state = SRB_READY;2992 free_tag(dcb, srb);2993 list_move(&srb->list, &dcb->srb_waiting_list);2994 waiting_set_timer(acb, HZ / 20);2995 2996 /* return; */2997 }2998 }2999 /* Read Reselected Target Id and LUN */3000 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))3001 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "3002 "Got %i!\n", rsel_tar_lun_id);3003 id = rsel_tar_lun_id & 0xff;3004 lun = (rsel_tar_lun_id >> 8) & 7;3005 dcb = find_dcb(acb, id, lun);3006 if (!dcb) {3007 dprintkl(KERN_ERR, "reselect: From non existent device "3008 "<%02i-%i>\n", id, lun);3009 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */3010 return;3011 }3012 acb->active_dcb = dcb;3013 3014 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))3015 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "3016 "disconnection? <%02i-%i>\n",3017 dcb->target_id, dcb->target_lun);3018 3019 if (dcb->sync_mode & EN_TAG_QUEUEING) {3020 srb = acb->tmp_srb;3021 dcb->active_srb = srb;3022 } else {3023 /* There can be only one! */3024 srb = dcb->active_srb;3025 if (!srb || !(srb->state & SRB_DISCONNECT)) {3026 /*3027 * abort command3028 */3029 dprintkl(KERN_DEBUG,3030 "reselect: w/o disconnected cmds <%02i-%i>\n",3031 dcb->target_id, dcb->target_lun);3032 srb = acb->tmp_srb;3033 srb->state = SRB_UNEXPECT_RESEL;3034 dcb->active_srb = srb;3035 enable_msgout_abort(acb, srb);3036 } else {3037 if (dcb->flag & ABORT_DEV_) {3038 /*srb->state = SRB_ABORT_SENT; */3039 enable_msgout_abort(acb, srb);3040 } else3041 srb->state = SRB_DATA_XFER;3042 3043 }3044 }3045 srb->scsi_phase = PH_BUS_FREE; /* initial phase */3046 3047 /* Program HA ID, target ID, period and offset */3048 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);3049 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */3050 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */3051 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */3052 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */3053 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */3054 /* SCSI command */3055 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);3056}3057 3058 3059static inline u8 tagq_blacklist(char *name)3060{3061#ifndef DC395x_NO_TAGQ3062#if 03063 u8 i;3064 for (i = 0; i < BADDEVCNT; i++)3065 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)3066 return 1;3067#endif3068 return 0;3069#else3070 return 1;3071#endif3072}3073 3074 3075static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)3076{3077 /* Check for SCSI format (ANSI and Response data format) */3078 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {3079 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)3080 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&3081 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */3082 /* ((dcb->dev_type == TYPE_DISK) 3083 || (dcb->dev_type == TYPE_MOD)) && */3084 !tagq_blacklist(((char *)ptr) + 8)) {3085 if (dcb->max_command == 1)3086 dcb->max_command =3087 dcb->acb->tag_max_num;3088 dcb->sync_mode |= EN_TAG_QUEUEING;3089 /*dcb->tag_mask = 0; */3090 } else3091 dcb->max_command = 1;3092 }3093}3094 3095 3096static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,3097 struct ScsiInqData *ptr)3098{3099 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;3100 dcb->dev_type = bval1;3101 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */3102 disc_tagq_set(dcb, ptr);3103}3104 3105 3106/* unmap mapped pci regions from SRB */3107static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)3108{3109 struct scsi_cmnd *cmd = srb->cmd;3110 enum dma_data_direction dir = cmd->sc_data_direction;3111 3112 if (scsi_sg_count(cmd) && dir != DMA_NONE) {3113 /* unmap DC395x SG list */3114 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",3115 srb->sg_bus_addr, SEGMENTX_LEN);3116 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,3117 DMA_TO_DEVICE);3118 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",3119 scsi_sg_count(cmd), scsi_bufflen(cmd));3120 /* unmap the sg segments */3121 scsi_dma_unmap(cmd);3122 }3123}3124 3125 3126/* unmap mapped pci sense buffer from SRB */3127static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,3128 struct ScsiReqBlk *srb)3129{3130 if (!(srb->flag & AUTO_REQSENSE))3131 return;3132 /* Unmap sense buffer */3133 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",3134 srb->segment_x[0].address);3135 dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,3136 srb->segment_x[0].length, DMA_FROM_DEVICE);3137 /* Restore SG stuff */3138 srb->total_xfer_length = srb->xferred;3139 srb->segment_x[0].address =3140 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;3141 srb->segment_x[0].length =3142 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;3143}3144 3145 3146/*3147 * Complete execution of a SCSI command3148 * Signal completion to the generic SCSI driver 3149 */3150static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,3151 struct ScsiReqBlk *srb)3152{3153 u8 tempcnt, status;3154 struct scsi_cmnd *cmd = srb->cmd;3155 enum dma_data_direction dir = cmd->sc_data_direction;3156 int ckc_only = 1;3157 3158 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,3159 srb->cmd->device->id, (u8)srb->cmd->device->lun);3160 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",3161 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,3162 scsi_sgtalbe(cmd));3163 status = srb->target_status;3164 set_host_byte(cmd, DID_OK);3165 set_status_byte(cmd, SAM_STAT_GOOD);3166 if (srb->flag & AUTO_REQSENSE) {3167 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");3168 pci_unmap_srb_sense(acb, srb);3169 /*3170 ** target status..........................3171 */3172 srb->flag &= ~AUTO_REQSENSE;3173 srb->adapter_status = 0;3174 srb->target_status = SAM_STAT_CHECK_CONDITION;3175 if (debug_enabled(DBG_1)) {3176 switch (cmd->sense_buffer[2] & 0x0f) {3177 case NOT_READY:3178 dprintkl(KERN_DEBUG,3179 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",3180 cmd->cmnd[0], dcb->target_id,3181 dcb->target_lun, status, acb->scan_devices);3182 break;3183 case UNIT_ATTENTION:3184 dprintkl(KERN_DEBUG,3185 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",3186 cmd->cmnd[0], dcb->target_id,3187 dcb->target_lun, status, acb->scan_devices);3188 break;3189 case ILLEGAL_REQUEST:3190 dprintkl(KERN_DEBUG,3191 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",3192 cmd->cmnd[0], dcb->target_id,3193 dcb->target_lun, status, acb->scan_devices);3194 break;3195 case MEDIUM_ERROR:3196 dprintkl(KERN_DEBUG,3197 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",3198 cmd->cmnd[0], dcb->target_id,3199 dcb->target_lun, status, acb->scan_devices);3200 break;3201 case HARDWARE_ERROR:3202 dprintkl(KERN_DEBUG,3203 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",3204 cmd->cmnd[0], dcb->target_id,3205 dcb->target_lun, status, acb->scan_devices);3206 break;3207 }3208 if (cmd->sense_buffer[7] >= 6)3209 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "3210 "(0x%08x 0x%08x)\n",3211 cmd->sense_buffer[2], cmd->sense_buffer[12],3212 cmd->sense_buffer[13],3213 *((unsigned int *)(cmd->sense_buffer + 3)),3214 *((unsigned int *)(cmd->sense_buffer + 8)));3215 else3216 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",3217 cmd->sense_buffer[2],3218 *((unsigned int *)(cmd->sense_buffer + 3)));3219 }3220 3221 if (status == SAM_STAT_CHECK_CONDITION) {3222 set_host_byte(cmd, DID_BAD_TARGET);3223 goto ckc_e;3224 }3225 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");3226 3227 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);3228 3229 goto ckc_e;3230 }3231 3232/*************************************************************/3233 if (status) {3234 /*3235 * target status..........................3236 */3237 if (status == SAM_STAT_CHECK_CONDITION) {3238 request_sense(acb, dcb, srb);3239 return;3240 } else if (status == SAM_STAT_TASK_SET_FULL) {3241 tempcnt = (u8)list_size(&dcb->srb_going_list);3242 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",3243 dcb->target_id, dcb->target_lun, tempcnt);3244 if (tempcnt > 1)3245 tempcnt--;3246 dcb->max_command = tempcnt;3247 free_tag(dcb, srb);3248 list_move(&srb->list, &dcb->srb_waiting_list);3249 waiting_set_timer(acb, HZ / 20);3250 srb->adapter_status = 0;3251 srb->target_status = 0;3252 return;3253 } else if (status == SCSI_STAT_SEL_TIMEOUT) {3254 srb->adapter_status = H_SEL_TIMEOUT;3255 srb->target_status = 0;3256 set_host_byte(cmd, DID_NO_CONNECT);3257 } else {3258 srb->adapter_status = 0;3259 set_host_byte(cmd, DID_ERROR);3260 set_status_byte(cmd, status);3261 }3262 } else {3263 /*3264 ** process initiator status..........................3265 */3266 status = srb->adapter_status;3267 if (status & H_OVER_UNDER_RUN) {3268 srb->target_status = 0;3269 scsi_msg_to_host_byte(cmd, srb->end_message);3270 } else if (srb->status & PARITY_ERROR) {3271 set_host_byte(cmd, DID_PARITY);3272 } else { /* No error */3273 3274 srb->adapter_status = 0;3275 srb->target_status = 0;3276 }3277 }3278 3279 ckc_only = 0;3280/* Check Error Conditions */3281 ckc_e:3282 3283 pci_unmap_srb(acb, srb);3284 3285 if (cmd->cmnd[0] == INQUIRY) {3286 unsigned char *base = NULL;3287 struct ScsiInqData *ptr;3288 unsigned long flags = 0;3289 struct scatterlist* sg = scsi_sglist(cmd);3290 size_t offset = 0, len = sizeof(struct ScsiInqData);3291 3292 local_irq_save(flags);3293 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);3294 ptr = (struct ScsiInqData *)(base + offset);3295 3296 if (!ckc_only && get_host_byte(cmd) == DID_OK3297 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 83298 && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)3299 dcb->inquiry7 = ptr->Flags;3300 3301 /*if( srb->cmd->cmnd[0] == INQUIRY && */3302 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */3303 if ((get_host_byte(cmd) == DID_OK) ||3304 (get_status_byte(cmd) == SAM_STAT_CHECK_CONDITION)) {3305 if (!dcb->init_tcq_flag) {3306 add_dev(acb, dcb, ptr);3307 dcb->init_tcq_flag = 1;3308 }3309 }3310 3311 scsi_kunmap_atomic_sg(base);3312 local_irq_restore(flags);3313 }3314 3315 /* Here is the info for Doug Gilbert's sg3 ... */3316 scsi_set_resid(cmd, srb->total_xfer_length);3317 if (debug_enabled(DBG_KG)) {3318 if (srb->total_xfer_length)3319 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "3320 "cmnd=0x%02x Missed %i bytes\n",3321 cmd, cmd->device->id, (u8)cmd->device->lun,3322 cmd->cmnd[0], srb->total_xfer_length);3323 }3324 3325 if (srb != acb->tmp_srb) {3326 /* Add to free list */3327 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",3328 cmd, cmd->result);3329 list_move_tail(&srb->list, &acb->srb_free_list);3330 } else {3331 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");3332 }3333 3334 scsi_done(cmd);3335 waiting_process_next(acb);3336}3337 3338 3339/* abort all cmds in our queues */3340static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,3341 struct scsi_cmnd *cmd, u8 force)3342{3343 struct DeviceCtlBlk *dcb;3344 dprintkl(KERN_INFO, "doing_srb_done: pids ");3345 3346 list_for_each_entry(dcb, &acb->dcb_list, list) {3347 struct ScsiReqBlk *srb;3348 struct ScsiReqBlk *tmp;3349 struct scsi_cmnd *p;3350 3351 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {3352 p = srb->cmd;3353 printk("G:%p(%02i-%i) ", p,3354 p->device->id, (u8)p->device->lun);3355 list_del(&srb->list);3356 free_tag(dcb, srb);3357 list_add_tail(&srb->list, &acb->srb_free_list);3358 set_host_byte(p, did_flag);3359 set_status_byte(p, SAM_STAT_GOOD);3360 pci_unmap_srb_sense(acb, srb);3361 pci_unmap_srb(acb, srb);3362 if (force) {3363 /* For new EH, we normally don't need to give commands back,3364 * as they all complete or all time out */3365 scsi_done(p);3366 }3367 }3368 if (!list_empty(&dcb->srb_going_list))3369 dprintkl(KERN_DEBUG, 3370 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",3371 dcb->target_id, dcb->target_lun);3372 if (dcb->tag_mask)3373 dprintkl(KERN_DEBUG,3374 "tag_mask for <%02i-%i> should be empty, is %08x!\n",3375 dcb->target_id, dcb->target_lun,3376 dcb->tag_mask);3377 3378 /* Waiting queue */3379 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {3380 p = srb->cmd;3381 3382 printk("W:%p<%02i-%i>", p, p->device->id,3383 (u8)p->device->lun);3384 list_move_tail(&srb->list, &acb->srb_free_list);3385 set_host_byte(p, did_flag);3386 set_status_byte(p, SAM_STAT_GOOD);3387 pci_unmap_srb_sense(acb, srb);3388 pci_unmap_srb(acb, srb);3389 if (force) {3390 /* For new EH, we normally don't need to give commands back,3391 * as they all complete or all time out */3392 scsi_done(cmd);3393 }3394 }3395 if (!list_empty(&dcb->srb_waiting_list))3396 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",3397 list_size(&dcb->srb_waiting_list), dcb->target_id,3398 dcb->target_lun);3399 dcb->flag &= ~ABORT_DEV_;3400 }3401 printk("\n");3402}3403 3404 3405static void reset_scsi_bus(struct AdapterCtlBlk *acb)3406{3407 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);3408 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */3409 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);3410 3411 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))3412 /* nothing */;3413}3414 3415 3416static void set_basic_config(struct AdapterCtlBlk *acb)3417{3418 u8 bval;3419 u16 wval;3420 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);3421 if (acb->config & HCC_PARITY)3422 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;3423 else3424 bval = PHASELATCH | INITIATOR | BLOCKRST;3425 3426 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);3427 3428 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */3429 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */3430 /* program Host ID */3431 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);3432 /* set ansynchronous transfer */3433 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);3434 /* Turn LED control off */3435 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;3436 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);3437 /* DMA config */3438 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;3439 wval |=3440 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;3441 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);3442 /* Clear pending interrupt status */3443 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);3444 /* Enable SCSI interrupt */3445 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);3446 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR3447 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */3448 );3449}3450 3451 3452static void scsi_reset_detect(struct AdapterCtlBlk *acb)3453{3454 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);3455 /* delay half a second */3456 if (timer_pending(&acb->waiting_timer))3457 del_timer(&acb->waiting_timer);3458 3459 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);3460 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);3461 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */3462 udelay(500);3463 /* Maybe we locked up the bus? Then lets wait even longer ... */3464 acb->last_reset =3465 jiffies + 5 * HZ / 2 +3466 HZ * acb->eeprom.delay_time;3467 3468 clear_fifo(acb, "scsi_reset_detect");3469 set_basic_config(acb);3470 /*1.25 */3471 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */3472 3473 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */3474 acb->acb_flag |= RESET_DONE;3475 } else {3476 acb->acb_flag |= RESET_DETECT;3477 reset_dev_param(acb);3478 doing_srb_done(acb, DID_RESET, NULL, 1);3479 /*DC395x_RecoverSRB( acb ); */3480 acb->active_dcb = NULL;3481 acb->acb_flag = 0;3482 waiting_process_next(acb);3483 }3484}3485 3486 3487static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,3488 struct ScsiReqBlk *srb)3489{3490 struct scsi_cmnd *cmd = srb->cmd;3491 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",3492 cmd, cmd->device->id, (u8)cmd->device->lun);3493 3494 srb->flag |= AUTO_REQSENSE;3495 srb->adapter_status = 0;3496 srb->target_status = 0;3497 3498 /* KG: Can this prevent crap sense data ? */3499 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);3500 3501 /* Save some data */3502 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =3503 srb->segment_x[0].address;3504 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =3505 srb->segment_x[0].length;3506 srb->xferred = srb->total_xfer_length;3507 /* srb->segment_x : a one entry of S/G list table */3508 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;3509 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;3510 /* Map sense buffer */3511 srb->segment_x[0].address = dma_map_single(&acb->dev->dev,3512 cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,3513 DMA_FROM_DEVICE);3514 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",3515 cmd->sense_buffer, srb->segment_x[0].address,3516 SCSI_SENSE_BUFFERSIZE);3517 srb->sg_count = 1;3518 srb->sg_index = 0;3519 3520 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */3521 dprintkl(KERN_DEBUG,3522 "request_sense: (0x%p) failed <%02i-%i>\n",3523 srb->cmd, dcb->target_id, dcb->target_lun);3524 list_move(&srb->list, &dcb->srb_waiting_list);3525 waiting_set_timer(acb, HZ / 100);3526 }3527}3528 3529 3530/**3531 * device_alloc - Allocate a new device instance. This create the3532 * devices instance and sets up all the data items. The adapter3533 * instance is required to obtain confiuration information for this3534 * device. This does *not* add this device to the adapters device3535 * list.3536 *3537 * @acb: The adapter to obtain configuration information from.3538 * @target: The target for the new device.3539 * @lun: The lun for the new device.3540 *3541 * Return the new device if successful or NULL on failure.3542 **/3543static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,3544 u8 target, u8 lun)3545{3546 struct NvRamType *eeprom = &acb->eeprom;3547 u8 period_index = eeprom->target[target].period & 0x07;3548 struct DeviceCtlBlk *dcb;3549 3550 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);3551 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);3552 if (!dcb)3553 return NULL;3554 dcb->acb = NULL;3555 INIT_LIST_HEAD(&dcb->srb_going_list);3556 INIT_LIST_HEAD(&dcb->srb_waiting_list);3557 dcb->active_srb = NULL;3558 dcb->tag_mask = 0;3559 dcb->max_command = 1;3560 dcb->target_id = target;3561 dcb->target_lun = lun;3562 dcb->dev_mode = eeprom->target[target].cfg0;3563#ifndef DC395x_NO_DISCONNECT3564 dcb->identify_msg =3565 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);3566#else3567 dcb->identify_msg = IDENTIFY(0, lun);3568#endif3569 dcb->inquiry7 = 0;3570 dcb->sync_mode = 0;3571 dcb->min_nego_period = clock_period[period_index];3572 dcb->sync_period = 0;3573 dcb->sync_offset = 0;3574 dcb->flag = 0;3575 3576#ifndef DC395x_NO_WIDE3577 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)3578 && (acb->config & HCC_WIDE_CARD))3579 dcb->sync_mode |= WIDE_NEGO_ENABLE;3580#endif3581#ifndef DC395x_NO_SYNC3582 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)3583 if (!(lun) || current_sync_offset)3584 dcb->sync_mode |= SYNC_NEGO_ENABLE;3585#endif3586 if (dcb->target_lun != 0) {3587 /* Copy settings */3588 struct DeviceCtlBlk *p = NULL, *iter;3589 3590 list_for_each_entry(iter, &acb->dcb_list, list)3591 if (iter->target_id == dcb->target_id) {3592 p = iter;3593 break;3594 }3595 3596 if (!p) {3597 kfree(dcb);3598 return NULL;3599 }3600 3601 dprintkdbg(DBG_1, 3602 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",3603 dcb->target_id, dcb->target_lun,3604 p->target_id, p->target_lun);3605 dcb->sync_mode = p->sync_mode;3606 dcb->sync_period = p->sync_period;3607 dcb->min_nego_period = p->min_nego_period;3608 dcb->sync_offset = p->sync_offset;3609 dcb->inquiry7 = p->inquiry7;3610 }3611 return dcb;3612}3613 3614 3615/**3616 * adapter_add_device - Adds the device instance to the adaptor instance.3617 *3618 * @acb: The adapter device to be updated3619 * @dcb: A newly created and initialised device instance to add.3620 **/3621static void adapter_add_device(struct AdapterCtlBlk *acb,3622 struct DeviceCtlBlk *dcb)3623{3624 /* backpointer to adapter */3625 dcb->acb = acb;3626 3627 /* set run_robin to this device if it is currently empty */3628 if (list_empty(&acb->dcb_list))3629 acb->dcb_run_robin = dcb;3630 3631 /* add device to list */3632 list_add_tail(&dcb->list, &acb->dcb_list);3633 3634 /* update device maps */3635 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);3636 acb->children[dcb->target_id][dcb->target_lun] = dcb;3637}3638 3639 3640/**3641 * adapter_remove_device - Removes the device instance from the adaptor3642 * instance. The device instance is not check in any way or freed by this. 3643 * The caller is expected to take care of that. This will simply remove the3644 * device from the adapters data strcutures.3645 *3646 * @acb: The adapter device to be updated3647 * @dcb: A device that has previously been added to the adapter.3648 **/3649static void adapter_remove_device(struct AdapterCtlBlk *acb,3650 struct DeviceCtlBlk *dcb)3651{3652 struct DeviceCtlBlk *i;3653 struct DeviceCtlBlk *tmp;3654 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",3655 dcb->target_id, dcb->target_lun);3656 3657 /* fix up any pointers to this device that we have in the adapter */3658 if (acb->active_dcb == dcb)3659 acb->active_dcb = NULL;3660 if (acb->dcb_run_robin == dcb)3661 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);3662 3663 /* unlink from list */3664 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)3665 if (dcb == i) {3666 list_del(&i->list);3667 break;3668 }3669 3670 /* clear map and children */ 3671 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);3672 acb->children[dcb->target_id][dcb->target_lun] = NULL;3673 dcb->acb = NULL;3674}3675 3676 3677/**3678 * adapter_remove_and_free_device - Removes a single device from the adapter3679 * and then frees the device information.3680 *3681 * @acb: The adapter device to be updated3682 * @dcb: A device that has previously been added to the adapter.3683 */3684static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,3685 struct DeviceCtlBlk *dcb)3686{3687 if (list_size(&dcb->srb_going_list) > 1) {3688 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "3689 "Won't remove because of %i active requests.\n",3690 dcb->target_id, dcb->target_lun,3691 list_size(&dcb->srb_going_list));3692 return;3693 }3694 adapter_remove_device(acb, dcb);3695 kfree(dcb);3696}3697 3698 3699/**3700 * adapter_remove_and_free_all_devices - Removes and frees all of the3701 * devices associated with the specified adapter.3702 *3703 * @acb: The adapter from which all devices should be removed.3704 **/3705static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)3706{3707 struct DeviceCtlBlk *dcb;3708 struct DeviceCtlBlk *tmp;3709 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",3710 list_size(&acb->dcb_list));3711 3712 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)3713 adapter_remove_and_free_device(acb, dcb);3714}3715 3716 3717/**3718 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new3719 * scsi device that we need to deal with. We allocate a new device and then3720 * insert that device into the adapters device list.3721 *3722 * @scsi_device: The new scsi device that we need to handle.3723 **/3724static int dc395x_slave_alloc(struct scsi_device *scsi_device)3725{3726 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;3727 struct DeviceCtlBlk *dcb;3728 3729 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);3730 if (!dcb)3731 return -ENOMEM;3732 adapter_add_device(acb, dcb);3733 3734 return 0;3735}3736 3737 3738/**3739 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a3740 * device that is going away.3741 *3742 * @scsi_device: The new scsi device that we need to handle.3743 **/3744static void dc395x_slave_destroy(struct scsi_device *scsi_device)3745{3746 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;3747 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);3748 if (dcb)3749 adapter_remove_and_free_device(acb, dcb);3750}3751 3752 3753 3754 3755/**3756 * trms1040_wait_30us: wait for 30 us3757 *3758 * Waits for 30us (using the chip by the looks of it..)3759 *3760 * @io_port: base I/O address3761 **/3762static void trms1040_wait_30us(unsigned long io_port)3763{3764 /* ScsiPortStallExecution(30); wait 30 us */3765 outb(5, io_port + TRM_S1040_GEN_TIMER);3766 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))3767 /* nothing */ ;3768}3769 3770 3771/**3772 * trms1040_write_cmd - write the secified command and address to3773 * chip3774 *3775 * @io_port: base I/O address3776 * @cmd: SB + op code (command) to send3777 * @addr: address to send3778 **/3779static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)3780{3781 int i;3782 u8 send_data;3783 3784 /* program SB + OP code */3785 for (i = 0; i < 3; i++, cmd <<= 1) {3786 send_data = NVR_SELECT;3787 if (cmd & 0x04) /* Start from bit 2 */3788 send_data |= NVR_BITOUT;3789 3790 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);3791 trms1040_wait_30us(io_port);3792 outb((send_data | NVR_CLOCK),3793 io_port + TRM_S1040_GEN_NVRAM);3794 trms1040_wait_30us(io_port);3795 }3796 3797 /* send address */3798 for (i = 0; i < 7; i++, addr <<= 1) {3799 send_data = NVR_SELECT;3800 if (addr & 0x40) /* Start from bit 6 */3801 send_data |= NVR_BITOUT;3802 3803 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);3804 trms1040_wait_30us(io_port);3805 outb((send_data | NVR_CLOCK),3806 io_port + TRM_S1040_GEN_NVRAM);3807 trms1040_wait_30us(io_port);3808 }3809 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);3810 trms1040_wait_30us(io_port);3811}3812 3813 3814/**3815 * trms1040_set_data - store a single byte in the eeprom3816 *3817 * Called from write all to write a single byte into the SSEEPROM3818 * Which is done one bit at a time.3819 *3820 * @io_port: base I/O address3821 * @addr: offset into EEPROM3822 * @byte: bytes to write3823 **/3824static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)3825{3826 int i;3827 u8 send_data;3828 3829 /* Send write command & address */3830 trms1040_write_cmd(io_port, 0x05, addr);3831 3832 /* Write data */3833 for (i = 0; i < 8; i++, byte <<= 1) {3834 send_data = NVR_SELECT;3835 if (byte & 0x80) /* Start from bit 7 */3836 send_data |= NVR_BITOUT;3837 3838 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);3839 trms1040_wait_30us(io_port);3840 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);3841 trms1040_wait_30us(io_port);3842 }3843 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);3844 trms1040_wait_30us(io_port);3845 3846 /* Disable chip select */3847 outb(0, io_port + TRM_S1040_GEN_NVRAM);3848 trms1040_wait_30us(io_port);3849 3850 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);3851 trms1040_wait_30us(io_port);3852 3853 /* Wait for write ready */3854 while (1) {3855 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);3856 trms1040_wait_30us(io_port);3857 3858 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);3859 trms1040_wait_30us(io_port);3860 3861 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)3862 break;3863 }3864 3865 /* Disable chip select */3866 outb(0, io_port + TRM_S1040_GEN_NVRAM);3867}3868 3869 3870/**3871 * trms1040_write_all - write 128 bytes to the eeprom3872 *3873 * Write the supplied 128 bytes to the chips SEEPROM3874 *3875 * @eeprom: the data to write3876 * @io_port: the base io port3877 **/3878static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)3879{3880 u8 *b_eeprom = (u8 *)eeprom;3881 u8 addr;3882 3883 /* Enable SEEPROM */3884 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),3885 io_port + TRM_S1040_GEN_CONTROL);3886 3887 /* write enable */3888 trms1040_write_cmd(io_port, 0x04, 0xFF);3889 outb(0, io_port + TRM_S1040_GEN_NVRAM);3890 trms1040_wait_30us(io_port);3891 3892 /* write */3893 for (addr = 0; addr < 128; addr++, b_eeprom++)3894 trms1040_set_data(io_port, addr, *b_eeprom);3895 3896 /* write disable */3897 trms1040_write_cmd(io_port, 0x04, 0x00);3898 outb(0, io_port + TRM_S1040_GEN_NVRAM);3899 trms1040_wait_30us(io_port);3900 3901 /* Disable SEEPROM */3902 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),3903 io_port + TRM_S1040_GEN_CONTROL);3904}3905 3906 3907/**3908 * trms1040_get_data - get a single byte from the eeprom3909 *3910 * Called from read all to read a single byte into the SSEEPROM3911 * Which is done one bit at a time.3912 *3913 * @io_port: base I/O address3914 * @addr: offset into SEEPROM3915 *3916 * Returns the byte read.3917 **/3918static u8 trms1040_get_data(unsigned long io_port, u8 addr)3919{3920 int i;3921 u8 read_byte;3922 u8 result = 0;3923 3924 /* Send read command & address */3925 trms1040_write_cmd(io_port, 0x06, addr);3926 3927 /* read data */3928 for (i = 0; i < 8; i++) {3929 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);3930 trms1040_wait_30us(io_port);3931 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);3932 3933 /* Get data bit while falling edge */3934 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);3935 result <<= 1;3936 if (read_byte & NVR_BITIN)3937 result |= 1;3938 3939 trms1040_wait_30us(io_port);3940 }3941 3942 /* Disable chip select */3943 outb(0, io_port + TRM_S1040_GEN_NVRAM);3944 return result;3945}3946 3947 3948/**3949 * trms1040_read_all - read all bytes from the eeprom3950 *3951 * Read the 128 bytes from the SEEPROM.3952 *3953 * @eeprom: where to store the data3954 * @io_port: the base io port3955 **/3956static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)3957{3958 u8 *b_eeprom = (u8 *)eeprom;3959 u8 addr;3960 3961 /* Enable SEEPROM */3962 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),3963 io_port + TRM_S1040_GEN_CONTROL);3964 3965 /* read details */3966 for (addr = 0; addr < 128; addr++, b_eeprom++)3967 *b_eeprom = trms1040_get_data(io_port, addr);3968 3969 /* Disable SEEPROM */3970 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),3971 io_port + TRM_S1040_GEN_CONTROL);3972}3973 3974 3975 3976/**3977 * check_eeprom - get and check contents of the eeprom3978 *3979 * Read seeprom 128 bytes into the memory provider in eeprom.3980 * Checks the checksum and if it's not correct it uses a set of default3981 * values.3982 *3983 * @eeprom: caller allocated strcuture to read the eeprom data into3984 * @io_port: io port to read from3985 **/3986static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)3987{3988 u16 *w_eeprom = (u16 *)eeprom;3989 u16 w_addr;3990 u16 cksum;3991 u32 d_addr;3992 u32 *d_eeprom;3993 3994 trms1040_read_all(eeprom, io_port); /* read eeprom */3995 3996 cksum = 0;3997 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;3998 w_addr++, w_eeprom++)3999 cksum += *w_eeprom;4000 if (cksum != 0x1234) {4001 /*4002 * Checksum is wrong.4003 * Load a set of defaults into the eeprom buffer4004 */4005 dprintkl(KERN_WARNING,4006 "EEProm checksum error: using default values and options.\n");4007 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;4008 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);4009 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;4010 eeprom->sub_sys_id[1] =4011 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);4012 eeprom->sub_class = 0x00;4013 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;4014 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);4015 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;4016 eeprom->device_id[1] =4017 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);4018 eeprom->reserved = 0x00;4019 4020 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;4021 d_addr < 16; d_addr++, d_eeprom++)4022 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */4023 4024 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */4025 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */4026 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)4027 *d_eeprom = 0x00;4028 4029 /* Now load defaults (maybe set by boot/module params) */4030 set_safe_settings();4031 fix_settings();4032 eeprom_override(eeprom);4033 4034 eeprom->cksum = 0x00;4035 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;4036 w_addr < 63; w_addr++, w_eeprom++)4037 cksum += *w_eeprom;4038 4039 *w_eeprom = 0x1234 - cksum;4040 trms1040_write_all(eeprom, io_port);4041 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;4042 } else {4043 set_safe_settings();4044 eeprom_index_to_delay(eeprom);4045 eeprom_override(eeprom);4046 }4047}4048 4049 4050/**4051 * print_eeprom_settings - output the eeprom settings4052 * to the kernel log so people can see what they were.4053 *4054 * @eeprom: The eeprom data strucutre to show details for.4055 **/4056static void print_eeprom_settings(struct NvRamType *eeprom)4057{4058 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",4059 eeprom->scsi_id,4060 eeprom->target[0].period,4061 clock_speed[eeprom->target[0].period] / 10,4062 clock_speed[eeprom->target[0].period] % 10,4063 eeprom->target[0].cfg0);4064 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",4065 eeprom->channel_cfg, eeprom->max_tag,4066 1 << eeprom->max_tag, eeprom->delay_time);4067}4068 4069 4070/* Free SG tables */4071static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)4072{4073 int i;4074 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;4075 4076 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)4077 kfree(acb->srb_array[i].segment_x);4078}4079 4080 4081/*4082 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)4083 * should never cross a page boundary */4084static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)4085{4086 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)4087 *SEGMENTX_LEN;4088 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;4089 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;4090 int srb_idx = 0;4091 unsigned i = 0;4092 struct SGentry *ptr;4093 4094 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)4095 acb->srb_array[i].segment_x = NULL;4096 4097 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);4098 while (pages--) {4099 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);4100 if (!ptr) {4101 adapter_sg_tables_free(acb);4102 return 1;4103 }4104 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",4105 PAGE_SIZE, ptr, srb_idx);4106 i = 0;4107 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)4108 acb->srb_array[srb_idx++].segment_x =4109 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);4110 }4111 if (i < srbs_per_page)4112 acb->srb.segment_x =4113 ptr + (i * DC395x_MAX_SG_LISTENTRY);4114 else4115 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");4116 return 0;4117}4118 4119 4120 4121/**4122 * adapter_print_config - print adapter connection and termination4123 * config4124 *4125 * The io port in the adapter needs to have been set before calling4126 * this function.4127 *4128 * @acb: The adapter to print the information for.4129 **/4130static void adapter_print_config(struct AdapterCtlBlk *acb)4131{4132 u8 bval;4133 4134 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);4135 dprintkl(KERN_INFO, "%sConnectors: ",4136 ((bval & WIDESCSI) ? "(Wide) " : ""));4137 if (!(bval & CON5068))4138 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");4139 if (!(bval & CON68))4140 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");4141 if (!(bval & CON50))4142 printk("int50 ");4143 if ((bval & (CON5068 | CON50 | CON68)) ==4144 0 /*(CON5068 | CON50 | CON68) */ )4145 printk(" Oops! (All 3?) ");4146 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);4147 printk(" Termination: ");4148 if (bval & DIS_TERM)4149 printk("Disabled\n");4150 else {4151 if (bval & AUTOTERM)4152 printk("Auto ");4153 if (bval & LOW8TERM)4154 printk("Low ");4155 if (bval & UP8TERM)4156 printk("High ");4157 printk("\n");4158 }4159}4160 4161 4162/**4163 * adapter_init_params - Initialize the various parameters in the4164 * adapter structure. Note that the pointer to the scsi_host is set4165 * early (when this instance is created) and the io_port and irq4166 * values are set later after they have been reserved. This just gets4167 * everything set to a good starting position.4168 *4169 * The eeprom structure in the adapter needs to have been set before4170 * calling this function.4171 *4172 * @acb: The adapter to initialize.4173 **/4174static void adapter_init_params(struct AdapterCtlBlk *acb)4175{4176 struct NvRamType *eeprom = &acb->eeprom;4177 int i;4178 4179 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */4180 /* NOTE: acb->io_port_base is set at port registration time */4181 /* NOTE: acb->io_port_len is set at port registration time */4182 4183 INIT_LIST_HEAD(&acb->dcb_list);4184 acb->dcb_run_robin = NULL;4185 acb->active_dcb = NULL;4186 4187 INIT_LIST_HEAD(&acb->srb_free_list);4188 /* temp SRB for Q tag used or abort command used */4189 acb->tmp_srb = &acb->srb;4190 timer_setup(&acb->waiting_timer, waiting_timeout, 0);4191 timer_setup(&acb->selto_timer, NULL, 0);4192 4193 acb->srb_count = DC395x_MAX_SRB_CNT;4194 4195 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */4196 /* NOTE: acb->irq_level is set at IRQ registration time */4197 4198 acb->tag_max_num = 1 << eeprom->max_tag;4199 if (acb->tag_max_num > 30)4200 acb->tag_max_num = 30;4201 4202 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */4203 acb->gmode2 = eeprom->channel_cfg;4204 acb->config = 0; /* NOTE: actually set in adapter_init_chip */4205 4206 if (eeprom->channel_cfg & NAC_SCANLUN)4207 acb->lun_chk = 1;4208 acb->scan_devices = 1;4209 4210 acb->scsi_host->this_id = eeprom->scsi_id;4211 acb->hostid_bit = (1 << acb->scsi_host->this_id);4212 4213 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)4214 acb->dcb_map[i] = 0;4215 4216 acb->msg_len = 0;4217 4218 /* link static array of srbs into the srb free list */4219 for (i = 0; i < acb->srb_count - 1; i++)4220 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);4221}4222 4223 4224/**4225 * adapter_init_scsi_host - Initialize the scsi host instance based on4226 * values that we have already stored in the adapter instance. There's4227 * some mention that a lot of these are deprecated, so we won't use4228 * them (we'll use the ones in the adapter instance) but we'll fill4229 * them in in case something else needs them.4230 *4231 * The eeprom structure, irq and io ports in the adapter need to have4232 * been set before calling this function.4233 *4234 * @host: The scsi host instance to fill in the values for.4235 **/4236static void adapter_init_scsi_host(struct Scsi_Host *host)4237{4238 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;4239 struct NvRamType *eeprom = &acb->eeprom;4240 4241 host->max_cmd_len = 24;4242 host->can_queue = DC395x_MAX_CMD_QUEUE;4243 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;4244 host->this_id = (int)eeprom->scsi_id;4245 host->io_port = acb->io_port_base;4246 host->n_io_port = acb->io_port_len;4247 host->dma_channel = -1;4248 host->unique_id = acb->io_port_base;4249 host->irq = acb->irq_level;4250 acb->last_reset = jiffies;4251 4252 host->max_id = 16;4253 if (host->max_id - 1 == eeprom->scsi_id)4254 host->max_id--;4255 4256 if (eeprom->channel_cfg & NAC_SCANLUN)4257 host->max_lun = 8;4258 else4259 host->max_lun = 1;4260}4261 4262 4263/**4264 * adapter_init_chip - Get the chip into a know state and figure out4265 * some of the settings that apply to this adapter.4266 *4267 * The io port in the adapter needs to have been set before calling4268 * this function. The config will be configured correctly on return.4269 *4270 * @acb: The adapter which we are to init.4271 **/4272static void adapter_init_chip(struct AdapterCtlBlk *acb)4273{4274 struct NvRamType *eeprom = &acb->eeprom;4275 4276 /* Mask all the interrupt */4277 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);4278 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);4279 4280 /* Reset SCSI module */4281 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);4282 4283 /* Reset PCI/DMA module */4284 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);4285 udelay(20);4286 4287 /* program configuration 0 */4288 acb->config = HCC_AUTOTERM | HCC_PARITY;4289 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)4290 acb->config |= HCC_WIDE_CARD;4291 4292 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)4293 acb->config |= HCC_SCSI_RESET;4294 4295 if (acb->config & HCC_SCSI_RESET) {4296 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");4297 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);4298 4299 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */4300 /*spin_unlock_irq (&io_request_lock); */4301 udelay(500);4302 4303 acb->last_reset =4304 jiffies + HZ / 2 +4305 HZ * acb->eeprom.delay_time;4306 4307 /*spin_lock_irq (&io_request_lock); */4308 }4309}4310 4311 4312/**4313 * adapter_init - Grab the resource for the card, setup the adapter4314 * information, set the card into a known state, create the various4315 * tables etc etc. This basically gets all adapter information all up4316 * to date, initialised and gets the chip in sync with it.4317 *4318 * @acb: The adapter which we are to init.4319 * @io_port: The base I/O port4320 * @io_port_len: The I/O port size4321 * @irq: IRQ4322 *4323 * Returns 0 if the initialization succeeds, any other value on4324 * failure.4325 **/4326static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,4327 u32 io_port_len, unsigned int irq)4328{4329 if (!request_region(io_port, io_port_len, DC395X_NAME)) {4330 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);4331 goto failed;4332 }4333 /* store port base to indicate we have registered it */4334 acb->io_port_base = io_port;4335 acb->io_port_len = io_port_len;4336 4337 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {4338 /* release the region we just claimed */4339 dprintkl(KERN_INFO, "Failed to register IRQ\n");4340 goto failed;4341 }4342 /* store irq to indicate we have registered it */4343 acb->irq_level = irq;4344 4345 /* get eeprom configuration information and command line settings etc */4346 check_eeprom(&acb->eeprom, io_port);4347 print_eeprom_settings(&acb->eeprom);4348 4349 /* setup adapter control block */ 4350 adapter_init_params(acb);4351 4352 /* display card connectors/termination settings */4353 adapter_print_config(acb);4354 4355 if (adapter_sg_tables_alloc(acb)) {4356 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");4357 goto failed;4358 }4359 adapter_init_scsi_host(acb->scsi_host);4360 adapter_init_chip(acb);4361 set_basic_config(acb);4362 4363 dprintkdbg(DBG_0,4364 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "4365 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",4366 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),4367 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));4368 return 0;4369 4370failed:4371 if (acb->irq_level)4372 free_irq(acb->irq_level, acb);4373 if (acb->io_port_base)4374 release_region(acb->io_port_base, acb->io_port_len);4375 adapter_sg_tables_free(acb);4376 4377 return 1;4378}4379 4380 4381/**4382 * adapter_uninit_chip - cleanly shut down the scsi controller chip,4383 * stopping all operations and disabling interrupt generation on the4384 * card.4385 *4386 * @acb: The adapter which we are to shutdown.4387 **/4388static void adapter_uninit_chip(struct AdapterCtlBlk *acb)4389{4390 /* disable interrupts */4391 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);4392 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);4393 4394 /* reset the scsi bus */4395 if (acb->config & HCC_SCSI_RESET)4396 reset_scsi_bus(acb);4397 4398 /* clear any pending interrupt state */4399 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);4400}4401 4402 4403 4404/**4405 * adapter_uninit - Shut down the chip and release any resources that4406 * we had allocated. Once this returns the adapter should not be used4407 * anymore.4408 *4409 * @acb: The adapter which we are to un-initialize.4410 **/4411static void adapter_uninit(struct AdapterCtlBlk *acb)4412{4413 unsigned long flags;4414 DC395x_LOCK_IO(acb->scsi_host, flags);4415 4416 /* remove timers */4417 if (timer_pending(&acb->waiting_timer))4418 del_timer(&acb->waiting_timer);4419 if (timer_pending(&acb->selto_timer))4420 del_timer(&acb->selto_timer);4421 4422 adapter_uninit_chip(acb);4423 adapter_remove_and_free_all_devices(acb);4424 DC395x_UNLOCK_IO(acb->scsi_host, flags);4425 4426 if (acb->irq_level)4427 free_irq(acb->irq_level, acb);4428 if (acb->io_port_base)4429 release_region(acb->io_port_base, acb->io_port_len);4430 4431 adapter_sg_tables_free(acb);4432}4433 4434 4435#undef YESNO4436#define YESNO(YN) \4437 if (YN) seq_printf(m, " Yes ");\4438 else seq_printf(m, " No ")4439 4440static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)4441{4442 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;4443 int spd, spd1;4444 struct DeviceCtlBlk *dcb;4445 unsigned long flags;4446 int dev;4447 4448 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"4449 " Driver Version " DC395X_VERSION "\n");4450 4451 DC395x_LOCK_IO(acb->scsi_host, flags);4452 4453 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);4454 seq_printf(m, "DC395U/UW/F DC315/U %s\n",4455 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");4456 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);4457 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);4458 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);4459 4460 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);4461 seq_printf(m, "AdapterID %i\n", host->this_id);4462 4463 seq_printf(m, "tag_max_num %i", acb->tag_max_num);4464 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */4465 seq_printf(m, ", FilterCfg 0x%02x",4466 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));4467 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);4468 /*seq_printf(m, "\n"); */4469 4470 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));4471 seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]);4472 seq_printf(m, " %8ph\n", &acb->dcb_map[8]);4473 4474 seq_puts(m,4475 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");4476 4477 dev = 0;4478 list_for_each_entry(dcb, &acb->dcb_list, list) {4479 int nego_period;4480 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,4481 dcb->target_lun);4482 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);4483 YESNO(dcb->sync_offset);4484 YESNO(dcb->sync_period & WIDE_SYNC);4485 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);4486 YESNO(dcb->dev_mode & NTC_DO_SEND_START);4487 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);4488 nego_period = clock_period[dcb->sync_period & 0x07] << 2;4489 if (dcb->sync_offset)4490 seq_printf(m, " %03i ns ", nego_period);4491 else4492 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));4493 4494 if (dcb->sync_offset & 0x0f) {4495 spd = 1000 / (nego_period);4496 spd1 = 1000 % (nego_period);4497 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);4498 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,4499 (dcb->sync_offset & 0x0f));4500 } else4501 seq_puts(m, " ");4502 4503 /* Add more info ... */4504 seq_printf(m, " %02i\n", dcb->max_command);4505 dev++;4506 }4507 4508 if (timer_pending(&acb->waiting_timer))4509 seq_puts(m, "Waiting queue timer running\n");4510 else4511 seq_putc(m, '\n');4512 4513 list_for_each_entry(dcb, &acb->dcb_list, list) {4514 struct ScsiReqBlk *srb;4515 if (!list_empty(&dcb->srb_waiting_list))4516 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",4517 dcb->target_id, dcb->target_lun,4518 list_size(&dcb->srb_waiting_list));4519 list_for_each_entry(srb, &dcb->srb_waiting_list, list)4520 seq_printf(m, " %p", srb->cmd);4521 if (!list_empty(&dcb->srb_going_list))4522 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",4523 dcb->target_id, dcb->target_lun,4524 list_size(&dcb->srb_going_list));4525 list_for_each_entry(srb, &dcb->srb_going_list, list)4526 seq_printf(m, " %p", srb->cmd);4527 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))4528 seq_putc(m, '\n');4529 }4530 4531 if (debug_enabled(DBG_1)) {4532 seq_printf(m, "DCB list for ACB %p:\n", acb);4533 list_for_each_entry(dcb, &acb->dcb_list, list) {4534 seq_printf(m, "%p -> ", dcb);4535 }4536 seq_puts(m, "END\n");4537 }4538 4539 DC395x_UNLOCK_IO(acb->scsi_host, flags);4540 return 0;4541}4542 4543 4544static const struct scsi_host_template dc395x_driver_template = {4545 .module = THIS_MODULE,4546 .proc_name = DC395X_NAME,4547 .show_info = dc395x_show_info,4548 .name = DC395X_BANNER " " DC395X_VERSION,4549 .queuecommand = dc395x_queue_command,4550 .slave_alloc = dc395x_slave_alloc,4551 .slave_destroy = dc395x_slave_destroy,4552 .can_queue = DC395x_MAX_CAN_QUEUE,4553 .this_id = 7,4554 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,4555 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,4556 .eh_abort_handler = dc395x_eh_abort,4557 .eh_bus_reset_handler = dc395x_eh_bus_reset,4558 .dma_boundary = PAGE_SIZE - 1,4559};4560 4561 4562/**4563 * banner_display - Display banner on first instance of driver4564 * initialized.4565 **/4566static void banner_display(void)4567{4568 static int banner_done = 0;4569 if (!banner_done)4570 {4571 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);4572 banner_done = 1;4573 }4574}4575 4576 4577/**4578 * dc395x_init_one - Initialise a single instance of the adapter.4579 *4580 * The PCI layer will call this once for each instance of the adapter4581 * that it finds in the system. The pci_dev strcuture indicates which4582 * instance we are being called from.4583 * 4584 * @dev: The PCI device to initialize.4585 * @id: Looks like a pointer to the entry in our pci device table4586 * that was actually matched by the PCI subsystem.4587 *4588 * Returns 0 on success, or an error code (-ve) on failure.4589 **/4590static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)4591{4592 struct Scsi_Host *scsi_host = NULL;4593 struct AdapterCtlBlk *acb = NULL;4594 unsigned long io_port_base;4595 unsigned int io_port_len;4596 unsigned int irq;4597 4598 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));4599 banner_display();4600 4601 if (pci_enable_device(dev))4602 {4603 dprintkl(KERN_INFO, "PCI Enable device failed.\n");4604 return -ENODEV;4605 }4606 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;4607 io_port_len = pci_resource_len(dev, 0);4608 irq = dev->irq;4609 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);4610 4611 /* allocate scsi host information (includes out adapter) */4612 scsi_host = scsi_host_alloc(&dc395x_driver_template,4613 sizeof(struct AdapterCtlBlk));4614 if (!scsi_host) {4615 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");4616 goto fail;4617 }4618 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;4619 acb->scsi_host = scsi_host;4620 acb->dev = dev;4621 4622 /* initialise the adapter and everything we need */4623 if (adapter_init(acb, io_port_base, io_port_len, irq)) {4624 dprintkl(KERN_INFO, "adapter init failed\n");4625 acb = NULL;4626 goto fail;4627 }4628 4629 pci_set_master(dev);4630 4631 /* get the scsi mid level to scan for new devices on the bus */4632 if (scsi_add_host(scsi_host, &dev->dev)) {4633 dprintkl(KERN_ERR, "scsi_add_host failed\n");4634 goto fail;4635 }4636 pci_set_drvdata(dev, scsi_host);4637 scsi_scan_host(scsi_host);4638 4639 return 0;4640 4641fail:4642 if (acb != NULL)4643 adapter_uninit(acb);4644 if (scsi_host != NULL)4645 scsi_host_put(scsi_host);4646 pci_disable_device(dev);4647 return -ENODEV;4648}4649 4650 4651/**4652 * dc395x_remove_one - Called to remove a single instance of the4653 * adapter.4654 *4655 * @dev: The PCI device to initialize.4656 **/4657static void dc395x_remove_one(struct pci_dev *dev)4658{4659 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);4660 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);4661 4662 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);4663 4664 scsi_remove_host(scsi_host);4665 adapter_uninit(acb);4666 pci_disable_device(dev);4667 scsi_host_put(scsi_host);4668}4669 4670 4671static struct pci_device_id dc395x_pci_table[] = {4672 {4673 .vendor = PCI_VENDOR_ID_TEKRAM,4674 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,4675 .subvendor = PCI_ANY_ID,4676 .subdevice = PCI_ANY_ID,4677 },4678 {} /* Terminating entry */4679};4680MODULE_DEVICE_TABLE(pci, dc395x_pci_table);4681 4682 4683static struct pci_driver dc395x_driver = {4684 .name = DC395X_NAME,4685 .id_table = dc395x_pci_table,4686 .probe = dc395x_init_one,4687 .remove = dc395x_remove_one,4688};4689module_pci_driver(dc395x_driver);4690 4691MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");4692MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");4693MODULE_LICENSE("GPL");4694